Applied Math 40S (Winter 2008)

So Long ...

2008-06-26T15:30:00.000-05:00

We had our graduation exercises today. A gentle push into the world for all of you. I hope you're leaving with the keys to your future in your hand.

I'm so glad we've had this time together,

Just to have a laugh or learn some math,

Seems we've just got started and before you know it,

Comes the time we have to say, "So Long!"

So long everybody! Watch this space in the fall for pointers to new blogs for each of my classes.

Farewell, Auf Wiedersehen, Adieu, and all those good bye things. ;-)

DEV PROJECT

2008-06-17T04:01:00.004-05:00

Mr. K i created an account for the DEV site but i didn't get a confirmation email back thats why i put it up here.

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Class Survey

2008-06-16T00:59:00.005-05:00

The exam is over and we did a little survey in class. The results are below; 19 students participated. If you'd like to add another comment on what you see here email me or leave a comment below this post.

There did seem to be one or two surveys that were irregular: The first ten questions all scored 1, the next three were 4s and 5s. Perhaps the instructions were misread?

Without any further ado, here are the results of our class's survey. Please share your thoughts by commenting (anonymously if you wish) below .....

Classroom Environment
The questions in this section were ranked using this 5 point scale:

Strongly Disagree	Disagree	Neutral	Agree	Strongly Agree
1	2	3	4	5

The bold numbers after each item are the average ratings given by the entire class.

1. The teacher was enthusiastic about teaching the course. 4.53

2. The teacher made students feel welcome in seeking help in/outside of class. 4.13

3. My interest in math has increased because of this course. 3.53

4. Students were encouraged to ask questions and were given meaningful answers. 4.21

5. The teacher enhanced the class through the use of humour. 4.37

6. Course materials were well understood and explained clearly by the teacher. 3.89

7. Graded materials fairly represented student understanding and effort. 3.53

8. The teacher showed a genuine interest in individual students. 3.76

9. I have learned something that I consider valuable. 3.37

10. The teacher normally came to class well prepared. 4.47

Overall Impression of the Course
The questions in this section were ranked using this 5 point scale:

Very Poor	Poor	Average	Good	Very Good
1	2	3	4	5

1. Compared with other high school courses I have taken, I would say this course was: 4.05

2. Compared with other high school teachers I have had, I would say this teacher is: 4.47

3. As an overall rating, I would say this teacher is: 4.53

Course Characteristics

1. Course difficulty, compared to other high school courses:

Very Easy
0%

Easy
5.3%

Average
36.8%

Difficult
57.9%

Very Difficult
0%

2. Course workload, compared to other high school courses:

Very Easy
0%

Easy
10.5%

Average
68.4%

Difficult
21.1%

Very Difficult
0%

3. Hours per week required outside of class:

0 to 2
21.1%

2 to 3
36.8%

3 to 5
26.3%

5 to 7
15.8%

over 7
0%

4. Expected grade in the course (n = 18):

F
5.6%

D
5.6%

C
50%

B
27.8%

A
11.1%

Specific Feedback
[Ed. Note: Numbers in parentheses indicate the number of students, over 1, that gave the same answer.]

What was your best learning experience in this course?

Scribe posts (2)
Solving problems on the SMARTboard (5)
Group work (8)
This blog (5)
Daily slides on the blog (2)
Developing Expert Voices Project (2)
Pre-Tests
Personal Finance Unit (2)
Design & Measurement Unit
Trigonometry
Not using textbooks
Class flows well
A lot of attention paid to students specific needs
Communication
Learning
Hands-on learning
Enjoyed this class
Teacher was enthusiastic
Help provided

What was your worst learning experience in this course?

None (3)
Not having a computer at home
Not having enough confidence to answer questions I knew were right
Scribes who missed important information
Blogging
Don't know
Not getting tests back quickly
Group work assignments
Not asking for help
Forgetting my calculator
Statistics Unit
Too much content in too little time
I don't like math
I didn't put enough effort into homework and tests (2)

What changes would you suggest to improve the way this course is taught?

Pick people to answer questions more often
Classmates should be more encouraging to form study groups
None (3)
I love this class and the people in it (2)
Return tests quicker (2)
It's good
Tell better jokes
Use a textbook
Have take-home assignments
Timed group work assessments are stressfull
There was too much homework
Scribing was hard
More time for each unit
I wish Pi Day was every day
Nothing, excellent class
In-class games
Make blogging optional

Additional Student Comments

Mr. K. I think you're an awesome teacher, you listen to each and every individual. I wouldn't change anything or want anything different as a student your teaching techniques are awesome and highly reasonable.
Mr. K. you are an inspiration.
It was a great semester and I'm glad to have been one of your students; no lie.
#1 teacher ... and well I've gone through more teachers than usual.

It's interesting to compare the items that were considered both the worst and best learning experiences. Also, take a look at the list of worst learning experiences compared to suggestions for next year. Help me do a better job next year by commenting on what you see here ....

Student Voices Episode 4: Justice, Lawrence, and Richard

2008-06-15T23:13:00.000-05:00

First an update on this podcast: While we have received few comments on this or any of our class blogs the number of times the audio files have been downloaded is remarkable ...

Episode 1: Jessie 2440 downloads

Episode 2: Tim_MATH_y 1766 downloads

Episode 3: Chris, Craig, Graeme 1367 downloads

Thanks to all our listeners. We might get one more published during this school year but this may be the last until September. In any case feel free to let us know your thoughts about what you heard; every comment is appreciated.

In this episode of Student Voices Justice, Lawrence, and Richard talk about how they put together their Developing Expert Voices project and what they learned in the process: how they they best learn math, how it can best be taught, and many other incidental things like team work and organizational skills.

They have titled their project with one of my favourite reminders to all my students: Mathematics is the Science of Patterns. If you watch any of the video content they created you'll hear several "in jokes", listen for them. Without any further ado, here is the podcast. A copy of the poster they made for their work is below.

(Download File 12.2Mb, 25 min. 30 sec.)

Photo Credit: Shadow singer by flickr user EugeniusD80

D.E.V.P 2008

2008-06-08T23:25:00.001-05:00

Development Expert Voice Project(Math) 2008 Copy

From: vanessa40sw08, 2 minutes ago

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SlideShare Link

2008-06-07T23:46:00.001-05:00

Here is our DEV project

DEV project

2008-06-07T01:28:00.002-05:00

okay so here is mine and michelle's dev project, or the link to it anyways. enjoy =)

http://www.slideshare.net/guestcc80a9/developing-expert-voices-452594

sorry about the lateness, ill explain it to you on monday mr.k

2008-06-06T23:17:00.002-05:00

Hey guys, here is our (Chunky and I's) D.E.V. project .
Do we post it in here?
Anyways, below this post is the link to our DEV project.
We hope you enjoy it.

http://web.splashcast.net/preview/?s=PDLZ6230AM

Today's Slides: June 6

2008-06-06T13:00:00.003-05:00

Here they are ...

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2008-06-05T16:49:00.005-05:00

Hi all,This is CowMilk , I'm a scribe for today ^^

Today we study about Fractal

SO... what is the Fractal ???

-A fractal is generally "a rough or fragmented geometric shape that can be split into parts, each of which is (at least approximately) a reduced-size copy of the whole.

To make the Sierpinski Tringle. At first, we find the midpoint of each side , and then draw three segments joining the midpoints. We will have 4 smaller triangles, continous for there 4 triangles, we will have some smaller smaller triangles .. When look at a part of the Sierpinski Tringle, we also see the "whole picture" but it smaller than

We can see what 's going on !! With The Knoch Snowflace

At first we divide the sides of the triangle to 3 bars ( they must be the same length). Then make another triangle at the centre bar

After that we work on drawing the Fractor.... That is all of today, remember draw the Fractor as the homework !!

Today's Slides: June 5

2008-06-05T12:41:00.002-05:00

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Today's Slides: June 4

2008-06-04T15:56:00.001-05:00

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2008-06-03T17:02:00.002-05:00

Hi everyone..this is my expert voices project. enjoy..

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by: grace

Today's Slides: June 3

2008-06-03T13:09:00.001-05:00

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Today's Slides: June 2

2008-06-02T15:53:00.003-05:00

Here the slides from this morning ...

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and from this afternoon ...

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Today's Slides: May 30

2008-05-30T12:35:00.001-05:00

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Today's Slides: May 27

2008-05-27T22:51:00.001-05:00

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Periodic Functions

2008-05-26T22:29:00.005-05:00

In the first part of class this morning we went over what we learned last class (Friday). After that we finished up about the role of Parameter B & the role of Parameter C. The pictures below are pretty straight forward on how it works & how to get it.

Okay, the picture above...I bet your wondering what does the 2 (or any #) in front of the X does!? It helps you find the period....Remember it's not the period it just helps you find it!

After that we went over are homework. Now, I give honors to the next scribe....and they are........ICKIE!!!!!

Today's Slides: May 26

2008-05-26T15:02:00.001-05:00

Here they are ...

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Today's Slides: May 23

2008-05-23T13:26:00.004-05:00

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Using sine for patterns

2008-05-23T12:45:00.005-05:00

Using SinReg for to figure out patterns is a useful feature. First of all, you need to enter the data into a statplot. Let us say for instance we are calculating the time we have of sunshine each month.

The order of the data that we will get starting after the data given of sunshine is, step 1. the list, step 2.the graph settings, step 3. the V-Win option, step 4. the graph with no line, step 5. the the SinReg list, step 6. the graph with the line.

Step 1.In order to make the list with the sunshine data, you enter the months of the year in list number 1 (ex. January = 1, Febuary = 2, March = 3, etc.). Next, you enter the data for each month into the second list (ex. January = 120, Febuary = 140, March = 178, etc). Once you are finished putting in the list data for each month, you will adjust your graph settings in step 2.

Step 2. you want to set up the data to display a scatter plot. The x and y would be list one and list two (in that order). Any data point can be used for your preferences (Mr.K likes to use the squares).

Step 3. in order to get a good view of the data, you want to set up your V-Win so it goes beyond the data point of of the highest and lowest x and y values. Do not set it up too far or else the data will be squashed.

Step 4. Press the graph button to acheive this data ( must do step 1 though 3 first).

Step 5. go to the calc menu, press reg, and scale down until you reach SinReg. you press it and you should get this formula (refer to the picture).

Step 6. You copy Sinreg to the graph menu. After you get to the graph screen, you must put in beside SinReg L1, L2, Y1. Press graph to get this step. The pattern is likely to continue the next year so now you have a approx. pattern (will never get line exactly with dot). SinReg is useful when getting patterns in a series of data within a certain time period.

BOB

2008-05-22T09:21:00.002-05:00

Okay, so for this unit, I think I did pretty well once I got the hang of using the right operations at the right time. The only problem I was having before was that I would subtract or add something at the wrong time, such as when buying a car (when you need to add values before and after you add the taxes). I think I strong point for me was that for the options questions I had a fairly easy time with it because by the time we got to it the only new thing was the common sense added to the answers. Good luck on the test everybody!

BOB - Personal Finance

2008-05-22T00:41:00.002-05:00

ok so i think i'm going to do good on this test, i've gone over the notes quite a few times and i feel like i just get scared of the longer questions =\ so hopefully i do ok =)

BOB

2008-05-22T00:30:00.002-05:00

This unit was okay for me, it's pretty easy to understand....it's just that there are lots of formulas that you have to remember that I can have trouble with. With the formulas I remember them right now(well, i think so)...but when I get the test I sometimes just blank so then I forget the stuff that I have learn &/or studied. So, I'm hoping that I won't blank out on the test tomorrow!!! That's all that I can think about to write....GOOD LUCK EVERYONE!

BOB

2008-05-22T00:13:00.002-05:00

I think i'll do good on the test tomorrow (or in a few hours, depending on what time it is right now). I understood this unit alot more than the past units. Sometimes the answers came to me easily, probably because i remember working on personal finance from grade 11 Applied Math. Like for example, when we first used TVM Solver at the beginning of this unit, it was pretty straightforward to me.
Some things I might have trouble on is questions on mortgage. Theres a lot of information to take in and it gets confusing at times. But then once everything is organized, then the answer is easy to find. For example, the question that involved Lucy Brown who wanted to buy a condo. That was very confusing, mostly because the way the word problems or worded, and i guess i just didnt really read it carefully or understand it well. But seeing the way it was done, it seemed so easy.
Also leasing is a bit of a pain in the butt. There's alot to do, like finding the depreciation, taxing it, down payments, monthly payments, blah blah blah.
Hopefully i do good on this test, right now i feel confident about it, but tests are always surprising.
Wish me luck! :)
(Sorry for the horrible grammar. Hehe. :))

BOB

2008-05-21T23:08:00.003-05:00

Hey guys, i just finished my scribe post and now im BOB-ing. Well, for this unit, i didn't really have much trouble with it, but i guess, my muddiest point would be the words used in personal finance. I understand taxes and all, but sometimes, some names of deductions are unfamiliar to me and I end up using it differently. My strongest point is that after i break it down, i know where all the numbers go on the calculator! I hope that everyone does well on this test! Goodluck!

2008-05-21T22:30:00.009-05:00

BOB - Personal Finance

I'd say this unit was a bit okay for me since I sort of remember a bit of it from applied grade 11.

For me, I feel that I do understand what's happening for the most part, but what has troubled me the most in the unit I think would be the whole process in leasing something. Because you have to find extra things like the residual value, depreciating value, etc.. and I find it a bit hard for myself to just remember how to get those values in order to continue on with the problem. I think I'm good to go with organizing the information on long looking questions though.. so I don't need to worry much about that. But, I tend to second guess myself of whether some certain value goes in which variable spot on the TVM Solver app. Looks like I need to study more.

Good luck everyone.

a[x_x]bc - macs

Periodic Functions

2008-05-21T22:30:00.006-05:00

Hey guys this is alvin again with another scribe post!

So what is "Periodic" (Period) really??

--Anything that repeats after a certain/fixed length of time.

Examples
-High tide vs. Low tide

-Heart beat

-Clocks
-Rotation of earth on sun or the Moon on earth

...etc.

The inner layer are in degreese while the outer fractions with the Pi are radians.

These sets are the most basic angles.

The ratio!

Dealing with negative numbers are a bit different, but not at all difficult. The negative numbers move clockwise while the positive numbers go counter-clockwise (Degrees). But as show on the diagram below, there are 2 ways of getting into the end point. Be careful on what the question is asking or you might end up using a wrong positive/negative number.

Over all, the class today was pretty blunt and covered alot of the stuff. So far its piece-easy, all you really need is to know the ratio, after that, you have a number of options on how to get your answer.

[For any questions, concerns, additions and corrections please leave a comment]

The next scribe is Rennie...?

2008-05-21T22:19:00.004-05:00

BOB

Dear Bob,

Tomorrow is the test and I hope I will be doing a good job with it because I have been actually studying harder and harder each day because I want to pass applied math very much and I want to increase my mark. These past 2 weeks we studied about financing a car, computers, mortgages, and making a net worth statement which I really didn't get to learn much about the things I have missed because of the Music trip and my Folk Dance Camp so I'm a bit scared for the test. In the future we're going to have to do all of this to survive and to calculate everything to be able to not be overcharged with things so we save up money and have it a teensy bit easier in life which is why we learnt in math about if we should Lease or buy a Car or Computer or to Rent or Buy a house. One thing I really disliked in this unit is calculating Mortgages I still don't quite understand how to do it properly such as your property after 1, 2, 5, or 10 years. Which is why I shall study and give it my all tonight and tommorow morning to understand how to do the questions that were given to us since day 1 of the Personal Finance Unit. Remember the formulas given to us such as the GDSR, PV of Loan, Equity of House, and Debt/Equity ratio. I hope that's all the formulas given =s maybe something about Net Worth = Assets - Liabilities. Well back to the studying and good luck to all my fellow classmates or to anyone out there who have a quiz, test, or exam to do tommorow^^. David-san signing out(:

BOB

2008-05-21T20:30:00.004-05:00

Uhm... today we started the new section, Periodic functions and also finished the Personal Finance. That is not the hard unit but we must be careful when read the question, and remember some formulae :
+GDSR
+PV of Loan ( when we lease a car)
+Equity of house
+Debt/Equity ratio
...I think that's it, ^^ Good luck to u guys and also good luck to me :P

BOB FM(Financing w/Math)

2008-05-21T19:29:00.003-05:00

Dear Bob FM,

Tomorrow is the test and I hope and getting a higher mark than my last tests so I can bump up my mark a bit.This past 2 weeks we studied about financing a CAR, COMPUTERS, MORTGAGES, and making a NET WORTH STATEMENT. Will we all face all those things in the future for our needs that's why we need to do the math and be smart about whether we should LEASE or BUY a car or computer; or; RENT or BUY a house. The one thing I love about this unit is, we actually apply this to our daily lives and it happens most of the time when we need to purchase something. Budgeting is one thing we need to consider when it comes to financing something we need in order to save alot of money. Also, one thing I unLOVED about this unit was calculating things about MORTGAGES such as your property after 1,2 or 5 years and all that. But, as I study I will most likely learn how to tackle those problems with no sweat. I guess that's all for my BOB FM. Hope we all get high marks in the test and have a nice day. This is BOB FM ,Ace Burpee saying GOOD LUCK with BOB FM.

Today's Slides: May 21

2008-05-21T15:39:00.001-05:00

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2008-05-20T22:29:00.003-05:00

So today We did practice exercises, which is the reason i volunteered to scribe.
First exercise is calculating the debt/equity ratio. What we do is add all the assets and liabilities.
question 1:
dave's assets:
$100,000 house
$20,000 car
$3,000 in bank
$4,000 near cash
$10,000 mutual funds
$3,000 in Canadian savings bond
$15,000 rrsp
Total=$155,000

Daves Liabilities:
$60,000 mortgage
$15,000 car loan
$4,000 credit card balance
$2,000 loan
total= $81,000

assets-liabilities= net worth
155,000-81,000= 74,000

Now to get the ratio we take liabilities subtract mortgage cause mortgage is one debt we would like to have.

81,000 - 60,000 = 21,000

now we take our liabilities subtract mortgage and divide it by our net worth

81,000-60,000/74,000 = 0.283

so daves liabilities are about 28% of his total net worth

So that was the first question, and the next question already has the answers on the next slide page so i don't think i need to go through it. Oh and our test is on Thursday so get your bob done.

the next scribe will be H20

BOB

2008-05-20T21:55:00.002-05:00

BOB post.... I found this unit pretty easy since it's just like a review from Accounting class; debit and credit, owner's equity etc. The only thing i found abit confusing was when to use the TVMSolver (when to change it from END to BEGIN) I still don't quite understand it, and i hope we can go through it in class. Other than that, all i need to do is look back at my notes.

Net Worth = Assets - Liabilities

Debt/Equity Ratio = (Total Liabilities - Mortgage) / Net Worth

Good luck

Today's Slides: May 20

2008-05-20T14:46:00.001-05:00

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Friday May 16 Scribe Post

2008-05-20T06:34:00.006-05:00

Friday in class we kept looking at Net Worth since we ran out of time last class. Mr. K again explained the different catagories of assests and liabilities there are. We continued on from there by looking at how to calculate your debt/equity ratio which shows how your debts compare to your net worth.

The Total Liabilities for the formula includes all short and long-term debts except for your mortgage as shown in the formula you must subtract from the total liabilities before you divide.

Mr. K also showed us a Net Worth spreadsheet to calculate you debt/equity ratio and Net Worth at the same time where you just type in all the types of assests and liabilities you have in there catagory.

Link: http://tinyurl.com/4x8exe

So after that we did a question on mona wanting to do some extensive house renovations. We used this spredsheet to calculate her debt/equity ratio and net worth in order to see if she was able to get the loan.

We find her debt/equity ratio to come up to 20% but if mona was to get a $15000 loan it would rise up to 51% which means the bank will probably not give her the loan since it is over 50%.

These are 3 tips to raise one's net worth:

1. Get higher rates of return on your investments.
2. Reduce your debts. Remember the more extra money you put on your payments you make on your debts the faster they will reduce.
3. Save more on a regular basis. Save at least 10% of your income. Save before you spend.

Next Scribe: David-san

Thursday May 15 Scribe Post

2008-05-19T20:52:00.006-05:00

So Thursday in class we had a short 3 question quiz that we later went over and corrected:

Question 1 was on emily wishing to obtain a new car. There were 2 options in this question for emily to buy her car, and you have to calculate witch option will cost emily the least.

In question 2 we had to calculate how much a farmers $60000 tractor would be worth after 6 years, at a 8% depreciation rate

per year.

The 3rd question was on a investment of $500 at the beginning of every month, since the payment is at the beginning of each month you have to change PMT from END to BEGIN ( shown in the picture on the left) .

We also went over the homework from the day before with two questions on Mr. T's family moving into another house where we had to find the total additional costs of moving. And Ms. Jonhston buying a home where we had to find if a 20 or 15-year mortgage would be better for her.

We also started learning about net worth(equity) which is the difference between assests and liabilities.

Net Worth = Assests - Liabilities

Assests are everythin of value that you own, and liabilities being any debt you owe.

We learned about the 3 catagories of assests there are: Liquid Assests, Semi-Liquid Assests, and Non-Liquid Assests

And 2 types of Liabilities: Short Term Debts, and Long-Term Debts.

Today's Slides: May 16

2008-05-16T11:16:00.002-05:00

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Today's Slides: May 15

2008-05-15T15:50:00.001-05:00

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today May 14

2008-05-15T00:42:00.004-05:00

we keep doing some problem :

The Petri Family: A Buy vrs. Rent Case Study The Petri family needs to move, and so they are looking for another home. They are considering buying or renting a home. The price of a suitable home is $125 000. The cost of renting a similar home is $875 per month. They have $21 000 invested in an account that is growing by 7% per year, and they will use this for the down payment and to cover the 'Additional Costs when Purchasing a Home' if they buy. They have also checked with their bank about a mortgage, and they can get a 25-year mortgage at 7.25% to pay for the balance of the home. Other things to consider are:

• the 'Additional Costs when Purchasing a Home' are $6000.00, and so they will have $15 000 for the down payment

• annual property taxes are about 1.5% of the value of the home

• the home is expected to appreciate at 4% per year

• rental payments are also expected to increase 4% per year

• they expect to receive 7% per year growth in their investment if they do not use the $21 000 as a down payment for the home.

1. What is the amount of the monthly mortgage payment?

2. If the property taxes are 1.5% of the market value, how much are property taxes the year they buy the home?After they own the home for 10 years?

***use the home price times 0.015 to find how much taxes for 1 year

***use the home price times 1.04 and power of 10 for 10 years = home with a appreciate for 10 years

***then times 0.015 to find the taxes after 10 years

3. What percent of the ﬁrst mortgage payment is used to pay interest?

***we'll find the interest of the first payment.

***then / the monthly payment to get the percentage.

5. If the market value of the home increases 4% per year, what is the value of the home after 10 years?

***home price times 1.04 power of 10 cause it's for 10 years

6. If they rented the home for one year at $875 per month, how much would they pay for the year?How much would the annual rental charge be for the 10th year they rent if rental rates increase 4% per year.

***monthly rental charge times 12(12 months in a year)

*** rental charge times 1.04 (the rental rate for a year) power of 10 (10 years)

7. If they rent the house and invest the $21 000 at 7% per year, how large would the investment be after 10 years?

*** TVM solver is good for this.

8. What equity does the Petri family have in the home immediately after buying it? After 2 years? After 3 years?

***∑Prn(1,12); ∑Prn(1,24); ∑Prn(1,36)

9. How do the mortgage payments and rental payments compare during the ﬁrst year? After 5 years? After 10 years?

*** rental charge times 1.04 power of number of years.

***then - monthly payment of buying.

10. i don't understand question 10........... :( need help

homeworks to do.........

Next scribe is David-san

scribe for May 13

2008-05-15T00:34:00.003-05:00

We did some problem in class this morning...
here is one :

A group of rural students is planning to go to university. One of the members of the group suggests that they purchase an older home rather than rent an apartment. After a careful analysis of their finances, the group decides that their gross monthly income would be around $3000.00. Monthly property taxes are estimated to be $125.00. Heating bills are estimated to be $150.00. The group can arrange a mortgage at a rate of 9%. The three members of the group are able to come up with a down payment of $8000.00. Determine the maximum affordable purchase price that can be considered if they take out a 25-year mortgage.

just have to remember that the mortgage in Canada is compounded twice a year....
the others are mostly the same......
there's some homework too....

i didn't scribe last night so............sorry
i'll scribe for today too!!! :(

Today's Slides: May 14

2008-05-14T15:35:00.001-05:00

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Today's Slides: May 13

2008-05-13T14:11:00.003-05:00

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Student Voices Episode 3: Chris, Craig, and Graeme

2008-05-12T23:22:00.000-05:00

In this episode of Student Voices three Advanced Placement Calculus students, Chris, Craig, and Graeme, talk about a wiki assignment they did to prepare for the exam. Then the conversation transitions to a discussion of the many things they learned while doing their Developing Expert Voices project. It ends with a challenge, the result of which will be featured in a future podcast.

Let Chris, Craig, and Graeme know what you thought about the podcast by leaving a comment here on this post or on the mirror of this post on their class blog.

(Download File 31.8Mb, 26 min. 30 sec.)

The video mentioned near the end of the podcast is called Daft Hands. Here it is:

Photo Credit: Shadow singer by flickr user EugeniusD80

Mortgages

2008-05-12T21:32:00.012-05:00

Hey everyone! Today we started to learn about mortgages. In the morning class we just mainly talked about the pros & cons about buying or renting homes. The number one pro for buying or renting a home is the LOCATION!! In the afternoon we just talked about costs when purchasing a home.

If you’re renting these are some things that you should keep in mind:

1. You need to pay the monthly rental payments in advance plus probably one month’s rent in advance as damage deposit.
2. It is cheaper to rent a home in the short run than buying, but it doesn’t create any assets.
3. You need to know what is included in the rental payments. Example: are the utilities (especially water, hydro, heating) included? Is the home furnished…etc.
4. When renting a house, the rental payments will increase over time and you don’t create any assets. If you buy a house then the value of the house normally increases with time.

Non-financial factors to consider when renting:

1. When renting you might be restricted to your lifestyle. Example, you maybe not be able to have pets, or modify the home to suit your personal needs.
2. Repairs, maintenance, or property taxes you are not responsible for. Example, if the hot water tank needs replacing, the owner is responsible.
3. It is better to rent then buy a home if you only need the home for a short time. So then you can avoid the inconvenience and expense of reselling the home.

Now, we will look at the costs associated with buying and renting a home.

"How Much Can I Afford to Pay for a Home?"
Banks and other lending institutions have developed a formula that
allows you to calculate the maximum price of a home you can afford.
This formula is known as the Gross Debt Service Ratio, or GDSR.
According to this formula, anyone buying a home should spend no
more than 32% of gross income on household or accommodation
expenses, including mortgage payments, property taxes, heating
and condo/strata fees. The formula may be written as:

Question #1
Lucy Brown wants to buy a condo, but does not know how much money she
should spend based on her income. She earns $44 000 per year, and has saved
$9000 for a down payment. The property taxes for the condo she likes are
$1500 per year, and the heating costs average $90 per month. The condo/strata
fees are $180 per month. The bank will give her a 25-year mortgage at an
interest rate of 7.5%. What is the maximum price she can afford for a condo,
based on spending no more than 32% of her gross income on household and
accommodation expenses?
Now since there is so much stuff in the question just break it down into small parts like it is done below.

Once you have done that you can finish answering the question…..like done below.

I know that you are probably wondering why C/Y is 2. Well it is 2 because by law in Canada the bank can ONLY compound you twice a year!
After you calculated everything your Present Value will be $118,696.49 after 25 years. Plus you have to include the $9000 down payment that Lucy has saved up. (Showed below)

I know that you might be wondering what do some of these mean...right down below are some of the definitions.

1. Appraisal fees- The process through which conclusions of property value are obtained; also refers to the report that sets forth the process of estimation and conclusion of value.
2. Property survey- The process by which boundaries are measured and land areas are determined; usually performed by a land surveyor.
3. Insurance costs for high ratio mortgages- This is only for first time house buyers, you only pay 5% of it & the bank pays the rest.
4. Land transfer tax- A tax payable to the Provincial Government by the purchaser upon the transfer of title from a seller.
5. Interest adjustments- Extra proceeds going to an investor who submits a convertible bond for conversion to account for interest accrued since the last date of record for an interest payment.
6. Legal fees- A fee paid for legal service.

I hope you guys like my scribe post & I'm sorry if the pictures arent that good….but now I’m off on my choir & vocal jazz trip to moose jaw! I am honored to announce that our next scribe post will be by the one the only H20!!!!! YEAH.

Today's Slides: May 12

2008-05-12T15:49:00.001-05:00

Here they are ...

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2008-05-11T23:37:00.005-05:00

Hello, im VERY SORRY about the late post..hope your not mad =)
aaanyways, here's the scribe from FRIDAY MAY 9, 2008.

We went over the homework from THURSDAY MAY 8, 2008

The answers for D&E are basically your personal opinion.

We worked on a group problem similar to the problem on thursday. Which can be found on slide 9. =D

The lucky winner of the next scribe post will be ........................................
VANESSA!! *the crowd roars* WOO HOO!

Today's Slides: May 9

2008-05-09T12:37:00.001-05:00

Here are today's slides, HOMEWORK is on slide 10 ...

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Scribe Post

2008-05-08T22:06:00.008-05:00

Hey everyone, my apologies for the late post (I just got home). But on with the post!

Today was a double class day, and in the morning we went over the spreadsheet on Jess' truck problem., and how to calculate the Present Value of a lease loan.

After that we went over last night's homework and used the spreadsheet as well to solve that problem. If you haven't noticed, there is a link underneath May 7's slides for you to use the spreadsheet at home.

At the beginning of the afternoon class we continued by comparing what happens to the monthly payments and total interest when you change the percentages, and when you change the amount of payments (length of loan). We found out that changing the percentages for the same loan does not significantly affect the monthly payments, or the total interest paid. However, if you change the length of the loan, you will get much bigger changes:

- On a shorter loan, i.e. 3 years, your monthly payments will be higher, but the total interest paid will be smaller.
- On a longer loan, i.e. 5 years, your monthly payments will be smaller but you will end up paying a lot more interest in the long run.

We were then left with Ted's truck to work on class, and whatever you did not finish in class is tonight's homework. Good luck to all!

And for tomorrow, Melissa can have the honors of scribing.

Today's Slides: May 8

2008-05-08T15:39:00.001-05:00

Here they are ...

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Scribe Post

2008-05-07T16:47:00.010-05:00

Alright, so basically we only had half of the class since we had a Grad assembly. In the last half of the class we looked over the homework we had to do last night:

Last Night's Homework
Jess also looks at the of leasing the vehicle for 3 years. The price is $24 950.00 plus PST (7%) and GST (5%). The residual value (i.e. the "buyout price") is set at 48% of the new price. The down payment is $2 250.00 and the interest rate is 8.75%.

(a) What is Jess' monthly lease payment?

(b) How much does Jess pay for the lease in total.

(c) If Jess decides to buy the truck at the end of the lease and makes a 2 year loan at 8% to pay the buy-out price, what is the total cost of the truck for her?

We also talked about the positives and negatives (Pros/Cons) of buying and leasing a car. The following image is a table of some pros/cons of buying or leasing of a car. These could also be used to help give a reasoning in questions that are given to you, (i.e. "Would it be better to buy the car or lease it." It all depends on personal preference.)

I hope this will help you understand more about personal finance. Comments are appreciated.

The next scribe will be..... . : : Яέήάή : : . .

Today's Slides: May 7

2008-05-07T13:51:00.003-05:00

Her they are ...

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You can view the spreadsheet we used in class today here.

Buying Vs. Leasing, Scribe Post, May 6th

2008-05-06T16:34:00.017-05:00

Hey Guys! So I'm the sexy(ehem) scribe today. Good thing we only had the morning class or else my scribe would have been longer than it should be. So, in class we talked about BUYING or LEASING a car. Mr. "K" told us that when LEASING a car or computer, that means we are renting an item owned by the lessor. We, the lessee, we must make bi-weekly or monthly payments to pay for the following:
THE 3 THE's

The depreciation of the item
The sales taxes on the amount of depreciation
The interest on the unpaid value of the item

At the end of the lease(rent), we either return the item or but it for the term they called "RESIDUAL VALUE" which means "The value of leased property at the end of the lease term".
Also, when we lease a (for example a car), we need to sign a lease agreement.
This agreement specifies 6 things:

The initial value of the item
The buy out price at the end of the lease
The down payment (if there is one)
The interest rate
The monthly payment
Any additional fees

There is also some restrictions applied to the lease agreement you've signed which aren't that bad if you're a good driver and have discipline in mileage. 2 Important Things:

A car lease will specify how many kms. you can drive
The fee per km. if you exceed this limit.

So, those are the things we learned in class today. With that, we also did a real life situation about BUYING or LEASING a car, whether it'd be new or used.

Whether it'd be BUYING or LEASING a car, it all depends on the price of the car and how it cost and how it should be paid.

We did one example in class where we were asked to find Jesse's monthly payments and the total cost of the truck.
I'll show you step by step how we get the answer in an organized way(ehem ehem).

Alright, that's all I could do to help you guys. I hope you learned something. Comments are welcome(maybe).

Next scribe is, ADAMSON(Chunkynator)

Today's Slides: May 6

2008-05-06T12:28:00.001-05:00

Here they are ...

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May 5th Scribe Post

2008-05-06T01:06:00.023-05:00

Hey guys, this is my 3rd scribe post..
Today we mostly got caught up in conversations about different things and with the firedrill..
Other than that we went through a couple of warmups and onto a new aspect on our current unit of personal finance.
The lesson we started to learn today was about owning or leasing cars - which one would be better to do?

One of the warmups we started off with was this one on loans:

You start off by inputting the data that you know into the correct places in application TVM Solver.
In this problem, we are given the:
PV ($8250 loan);
I% (8.9%)
P/Y C/Y (compounded monthly)
N (loan repaid in two years [ 24 monthly payments ])

Remember that PV is kept as a positive number this time because since you are loaning money, you are GAINING money that's practically in your pocket rather than investing money that won't be in your pocket.
Use the solve function to find the monthly payment for the loan (PMT).
To find the COST OF THE LOAN multiply the PMT (that you just found) by the # of payments.
To find the INTEREST PAID take the cost of the loan (that you also just found) and subtract it by the previous value (PV).

On these car problems~~ You have to keep in mind that:
When buying a car... You MUST pay;
PST (7%) + GST (5%) when purchasing a NEW car [ 12% tax total ] &
PST (7%) ONLY when purchasing a USED car.

Let's look at the first problem that was given to us on this lesson..
(#1)

Jeff had to pay $21616

-Simply, Jeff is buying a NEW car (12% tax) and selling off his older car to a dealership or somewhere.
-Remember to calculate taxes he must pay AFTER subtracting the cost of the Dodge first because he only has to pay tax on the new Chevy truck that he is buying, not something he is trading in.
***$19300 is being multiplied by 1.12 because that is 12% OF the value + the current value so you won't have to do extra steps on your calculator.***

(#2)

The car is worth 32.77% of it's original value in 5 years.
(since the value of the car was not given we found the % of what the car would be worth instead)

-Because the car constantly decreases in value by 20% every year (due to the way things are in this world) , what's left of the car's value each year is 80% of it...
-So you take 100, multiply it by 0.80 (80%) five times to get the answer for 5 years.

And think about it, if it decreases in value 20% every year, it WON'T be worth nothing in 5 years because its always dealing with a different number. Not stacking up the 20%'s up to 100% of the value.

That's it, that's all.

Thanks for volunteering as the next scribe . . . .
iam.wil

Today's Slides: May 5

2008-05-05T13:42:00.001-05:00

Here they are ...

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Scribe Post May 02

2008-05-02T16:34:00.004-05:00

Today we go over the quiz that we did yesterday. Here are the answer for the quiz:

a)N=120                                b)N=60
I%=4                                          I%=5
PV= -370000                           PV=20000
PMT=0                                      PMT= -377.42
FV=551608.09                         FV=0
P/Y=12                                      P/Y=12
C/Y=12                                      C/Y=12

c) N=60                                                             d)N=60
I=3.8%                                                                  I%=3.8
PV=0                                                                     PV= -238960.6
PMT= -(4000-377.42)= -3622.58                   PMT= -4000
FV=244457.4                                                       FV=559378.08
P/Y=12                                                                 P/Y=12
C/Y=12                                                                 C/Y=12

Next scribe is CJ...

Today's Slides: May 2

2008-05-02T15:55:00.001-05:00

Here they are ...

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Personal Finance Blog Assignment 1b

2008-05-02T15:47:00.003-05:00

Reply to the question below in the comments to this post. You must include your first name when you publish your reply. If you wish, you may instead choose to answer the problem published as Personal Finance Blog Assignment 1a

You MAY NOT COPY a response published by a student before you. Be creative and create a new or different scenario of your own.

If necessary, click on the image to enlarge it.

Personal Finance Blog Assignment 1a

2008-05-02T15:42:00.005-05:00

Reply to the question below in the comments to this post. You must include your first name when you publish your reply. If you wish, you may instead choose to answer the problem published as Personal Finance Blog Assignment 1b

You MAY NOT COPY a response published by a student before you. Be creative and create a new or different scenario of your own.

If necessary, click on the image to enlarge it.

2008-05-01T21:17:00.002-05:00

Alright so i'm the scribe for some reason, but luckily all we did in class is some quiz and for some mythical reason i seem to remember some of the question, I forgot one of the question which is important, I guess the other questions can't be solved.

-So some person is gonna get a sum of cash, but he wants to buy a $20,000 car. His lawyer offers him two options.

Option 1.
pay cash for the car
the rest of $370,000 is invested at a rate of 4% per year, compounded monthly.

Option 2.
Receive $4000 a monthly for the next 10 years
- Finance your car for 5 years with a interest rate of %5 compounded monthly
- Invest the remaining monthly allowance at a rate of 3.8% per year compounded monthly

Basically try to find which is better.

I shouldn't be the scribe but I guess i'll do today because its easy. So the next scribe is Sezy

Scribe Post

2008-04-30T16:57:00.005-05:00

Today we studied about The Rule of 72. We can use this rule to calculate the "Interest Rate" and the "# of years to double" your amount of money. Here is the formula:
(Interest Rate) x (Years to double) = 72.
Because I can't find today's slide so I don't remember the question we did so clearly. It was like: You invest your money in 2 ways: $1200 a year or $100 a month with the interest rate 6% in 1 year. Compare those 2 ways. Here is my answer for this question:
a) $1200 a year:                                       b) $100 a month:
N=1                                                              N=12
I%=6                                                            I%=6
PV=0                                                           PV=0
PMT=-1200                                               PMT=-100
FV=alpha+solve = 1200                           FV=1233.556
P/Y=1                                                          P/Y=12
C/Y=1                                                          C/Y=12

If you invest your money $100 a month , you will gain extra:
$1233.556 - $1200 = $33.556

Next scribe is Ari5

Today's Slides: April 30

2008-04-30T15:37:00.003-05:00

Here they are ...

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Wednesday, April 30,2008

2008-04-30T02:31:00.005-05:00

This is my first scribe......I dunno what to put in here. OK

Today!!! we learned about the "Personal Finance".

The slice Mr.K uploaded was explain everything. Nothing i can tell.

Today's Slides: April 29

2008-04-29T15:37:00.001-05:00

Here they are ...

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Today's Slides: April 28

2008-04-28T14:50:00.001-05:00

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BOB

2008-04-27T21:42:00.000-05:00

Hey everybody ! Test is tommorow! At the moment I'm studying as much as I can to do awesome at this test because I really want to pass this course. The unit is pretty easy except for the wording of course *sweat* I have trouble understanding the wording of the questions for this unit >< But I think once I get it it's gonna be a bit smoother on the road to answer the questions.

Well for this unit I learnt how to properly use the protractor once again *laughs at self* I had forgotten how to actually properly use one=S but, luckily I slowly remembered how to and I've been doing alright for the questions. Good luck on the test tommorow guys going back to studying!

BOB- vectors

2008-04-27T21:38:00.005-05:00

ok for some very strange reason i find this unit quite difficult at times but i hope that by practicing more with the formulas that adamson referred to, i can figure out the problems i just think that i get stuck when it says "due" or "with a bearing" in the word problems. otherwise i think i'll be ok... but i gotta go back to studying =(

BOB

2008-04-27T21:38:00.004-05:00

Hey guys its alvin. right now im studying for the test tomorrow. the only muddiest point i have is the wording, some of you guys probably have the same problem as me. but 1 thing that i found useful is if u actually write the actual words down on ur paper, it begins to make sense. per instance:

1 banana vs 1 apple

re-write 1 banana then below it write 1 apple. then all u have to do is figure it out 1 by 1. my strength pretty much if i get the wording, i can solve it right away- -so pretty much everything is okay, im just worried about the wordings for tomorrow. well goodluck guys!

Dear BOB

2008-04-27T21:37:00.004-05:00

Dear BOB,

So there's this girl(LOL). That's not my BOB. Anyways. Guys study for your test tomorrow. Do more problems. Go over all the problems that we did in class or homework. Make sure we all get it. Vector is one of the easiest unit but we still got to do our best to pass the test. Well, the part I didn't get in Vector unit is how to find the BEARING. But as I re-do all the problems we did then I'll be able to get it hopefully. The one thing I understood and liked about the unit is measuring. Using a scale and sketching on the paper and writing down the right degree. So, I think that's all for now. Good Luck on the Test tomorrow. Eat an energy bar(VECTOR) before you take the test to do well for the test. Alright laters mathers.

Yours dearly,
Wilfred N.

Student Voices Episode 2: Tim_MATH_y

2008-04-27T19:22:00.001-05:00

In this episode Timothy came back to school on Friday afternoon to talk about his week attending the miniUniversity program at the University of Winnipeg. He talks about the differences he finds between teaching and learning at high school and university and describes learning in the university classroom using a thought provoking metaphor, listen for it. Also, we have a cameo appearance by two very special people at the very end.

Please feel free to leave Tim_MATH_y your comments here on this post.

(Download File 7.2Mb, 15 min. 3 sec.)

Photo Credit: Shadow singer by flickr user EugeniusD80

BOB

2008-04-27T19:15:00.002-05:00

Alright, test moonday on vectors; probably the shortest unit in this class. I really don't find anything too difficult in this unit, except when trying to draw the diagram; I tend to overthink the question an second guess my diagram. That would be my down fall to this test; don't overthink the question.

Formulas you should remember (all found in April 22 slides):

- Sine Law

- Cosine Law

- Pythagoras Theory

- Properties of Angles

Another thing you should remember to use is, the TRISOLV2 program which can help you find angles and sides (TRISOLV2, April 23 slides). You can use the TRISOLV2 program to try to solve the question; you can also use it to help check your work. All in all goodluck to everyone on the test tomorrow.

2008-04-27T11:01:00.006-05:00

Oki ...CowMIlk continue to be the scribe T_T . How about your pre-test ...that was not easy :P and I hope the real test will easy . Friday, we worked on the pre test and corrected the "challenge question", and we had a small problem... Let's check the answer of "challenge question".

This is wrong because the question is : "the ship NEED to travelin direction of 40 degree" , not "the ship to travel in direction of 40 degree ". So the resultant vector must be bearing 40 degree and the ship must travel with the vector which add the vector of current = the resultant vector ( we thought the ship travel in direction of 40 degree and is pushed by the current <== that 's wrong, the ship must keep its direction of 40 degree).

So the right answer must be :

Next scribe will be Carmel

2008-04-27T10:49:00.002-05:00

HI allll !! Test tomorrow >"< .In this chapter, we just have few formulae: law of cos, law of sin, Adding 2 vectors, but when apply there formula to exercises, we must be careful . Finally..good luck

2008-04-26T14:18:00.003-05:00

Well the test is on monday, and i hope i do good, but the problem i have is drawing the diagram. I can do everything else okay, but its difficult for me to draw the diagram. I'll ask others on how to draw the diagram, but i'm sure i'm not the only one with this problem.

Today's Slides: April 25

2008-04-25T15:46:00.001-05:00

Here they are ...

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2008-04-25T01:39:00.003-05:00

Hey guys the scribe post for today was me and well I will be happy to say that our "Vector Unit" is finished! Which will lead us to our "Personal Finance Unit" I'm assuming. The pre-test is tommorow I hope all of us will do well for the both the pre-test and the real test. I'm still not that confident with the vector unit but, I'm pretty confident of this question which I answered in the homewor k given just a day ago.

First Step: You are given an angle of 150 degrees and a magnitude of 550mph. Draw a Cartesian plane and then use a protractor to measure the angle of 150 degrees and draw a line for the first line.

Second Step: With the 2nd angle and magnitude given draw the line which is a bearing of 80 degrees and a magnitude of 175mph.

Third Step: Draw the Resultant vector by drawing a line from the tail of the arrow to the tip.

Fourth Step: Find the angles and sides you have and see what formula to use which in this case is the Cosine Law because you have a Side, Angle and Side.

Fifth Step: Square root the answer you got to get the answer by itself and not squared.

OR

You step most the Fourth and Fifth step and just use the program "TRISOLV2"

Well this ends my Scribe post for today and the next scribe will be... CowMilk

BOB

2008-04-24T21:14:00.004-05:00

Kay so...since we're going to have a test real soon, I'll post up my blog now. Um.. this unit went by pretty fast compared to the other units and I'm not sure if I'm even ready for the test. I found drawing vectors in scale diagrams the easiest. However, what I found difficult was seeing the letters in the angles.. the alternate sides and corresponding sides.. the Z's and the F's. But after going over the homework from previous nights I think I got the hang of which angles belong where. The only thing I'm concerned about now, is whether or not I'm doing the work right... Mr. K, can you post up the answers to our homework so that I can compare my answers to the actual answers to the questions? It'll help me a lot when I study over the weekend =). Anyways, the other thing I don't understand is how to use the function TRISOLV2 on my calculator because the day we were learning how to use it, my batteries died out. But I don't mind it much because I like dealing with the formulas Sine Law and Cosine Law. Other than that, I hope I do well on both the pre-test and the test 'cause I really want to bump up my mark.

Today's Slides: April 24

2008-04-24T13:18:00.001-05:00

Here they are ...

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2008-04-23T23:41:00.004-05:00

The next scribe will be.......................................................................................................christine m.

Today's Slides: April 23

2008-04-23T12:50:00.001-05:00

Here they are ...

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Scribe Post April 22

2008-04-22T16:38:00.010-05:00

Hi guys, today we studied about solving problems using Trigonometric Method: Pythagorean Theorem, Law of Sine and Law of Cosine.

You can use Law of Cosine when you have Side Side Side (SSS) or Side Angle Side(SAS). Otherwise, you can use Law of Sine to solve the problems.

We also did an example by using Law of Cosine and Properties of angles. Here are the answers:
_ Magnitude of the resultant vector: 0.0644 N
_ The direction of the resultant vector: bearing 70.48 degree.

The next scribe will be ickie .

Today's Slides: April 22

2008-04-22T14:03:00.001-05:00

Here they are ...

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Scribe Post - Vectors

2008-04-21T21:15:00.007-05:00

Hey guys, I'm the scribe post for today, April 21st.

**SORRY YOU HAVE TO CLICK
THE PICTURES TO HAVE A BETTER LOOK AT IT**

As most of you should know, we had a substitute today for class.
We were given a worksheet to complete on vectors.
Here it is...

Tomorrow's scribe will be . . . . .
NguyenX
(unless someone would like to volunteer *evil stare*)

Vectors Scribe Post

2008-04-21T19:44:00.005-05:00

Sorry for the late post guys. here is just a quick rundown of the stuff that we learned from vectors.

For people that were confused about what the difference is between scalars and vectors, here is the definition:

Scalars are quantities which are fully described by a magnitude (or numerical value) alone.

Vectors are quantities which are fully described by both a magnitude and a direction.

If you have more troubles with scalars and vectors, check this site out:

http://www.glenbrook.k12.il.us/gbssci/Phys/Class/1DKin/U1L1b.html

2008-04-20T22:08:00.008-05:00

Alright Ladies and Gentlemen, I don't really have such fancy tools to do this post, but i'll try to explain what we learn.

Adding Vectors Using Scale Diagrams..
-A vector is represented by an arrow. Its LENGTH determines its magnitude and the tip determines direction.

The Triangle Method : Tip to tail.

The red: Is the resultant of the two vectors
The Black: are the vectors in which the arrow, connects to the
end of the second arrow(vector). Which is why it is called tip to tail.

Practice:
Basically we measure using a ruler.
then measure the 2 end points to find the resultant of the two vectors.

The Parallelogram Method: Tip to Tail
The red: Is one vector and the other red one without the arrow is the mirror image on the other side.
The blue: is the other vector, with the same mirror image.
The green: is the resultant of the two vectors.
Now see how the two vectors tails connect, thats why its tip to tail.
the arrows show the directions each vector got copied from.
I don't see the big difference, the resultant is still the same as a the triangle method.
Practice:
So all we use is a ruler to find the lengths, but if you wanna find the angles, you got to use a protractor.

This is basically what we learned because we had the afternoon off. The next scribe is C.J

Student Voices Podcast Episode 1: Jessie

2008-04-19T13:19:00.003-05:00

I was talking to Jessie earlier this week while helping her review over the lunch hour. I found her comments so compelling I asked her (and later her parents) if I could record and publish her comments so other students could hear what she had to say. I've long thought students need to hear from other students how they best learn to help them all learn.

This is the first in what I hope will be a series of podcasts called Student Voices. I'm hoping to have one of these short conversations with a student published each week. If you'd like to volunteer to be featured in one of these just let me know.

In this episode Jessie shares how she uses her class blog to learn and describes her personal "tipping point" from being confused to understanding Statistics very well. She also discusses the value of learning conversations and how sometimes being a "teacher" and sometimes a student helps her learn.

Please feel free to leave Jessie your comments here on this post.

(Download File 5.6Mb, 11 min. 40 sec.)

Photo Credit: Kids of conversation by flickr user Kris Hoet

Today's Slides: April 18

2008-04-18T13:40:00.001-05:00

Here they are ...

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2008-04-16T23:41:00.004-05:00

SO Statistics is the hardest unit, and I'm sure everyone agrees with me. I know how to do the work, its remembering how I did it that [gives me a hard time]. I haven't had much time to go on the computer to check posts, so I just download the homework, and print it. I guess what really got to my head is i expect what i recently learned to be on the pretest, so I totally forget what the earlier work we did. That would be shade norm function, and all the little problems that come with it. Like for instance, find 5 deviations to the left or right, adding and subtracting the deviation to the mean, and all that jazz. Hopefully I'll do alright and leave my first answer on the paper and don't second guess myself.

BOB

2008-04-16T23:25:00.002-05:00

well this was a pretty hard unit, and i know many of you agree. I for one had many weak areas that I need to improve upon. I know that i can't stop studying, i hope i do good on the test. The concepts of knowing when the right time to use normalcdf, normalpdf, binomcdf, and binompdf is starting to become a bit clearly but still I may need to further my knowledge.

good luck to everyone tommorow.

B.O.B.

2008-04-16T22:36:00.000-05:00

Statistics definitely one of the hardest units that we did so far.. Not too confident at all with it but, trying my best to do it even though I know I'm going to do bad. Doesn't hurt to keep studying right? Haven't had much time to do homework at all but, I actually have been trying during the prep time I have to keep up. I actually think I understand "Confidence Intervals" but, not too much on the others. The problem is just knowing when to use normalpdf, normalcdf, binompdf, or binomcdf is the thing. I'm doing my best to understand these functions though and it seems as though if I wanted to use normalcdf it'd calculate a continuous data and binomcdf which would calculate discrete data meaning no decimals. What "normalcdf" means is "Normal Cumulative Distribution Function" and "binomcdf" means "Binomial Cumulative Distribution Function." An example of one is the lightbulb question in the pre-test. Well I hope this is a good enough B.O.B. and wish everyone Good Luck on the test tommorow and study hard!

BOB

2008-04-16T22:06:00.003-05:00

Hey guys this is Alvin. I'm pretty nervous about the unit test, i dont think that im going to do well on it. i actually had a few muddy points, but right now my only concern is the confidence intervals. its still pretty blurry to me, but thanks to the blog, i think ill be alright.
I think that my strongest point is in the shadenorm(), i spent some time with it so it shouldnt give me any hickups.

BOB

2008-04-16T17:56:00.002-05:00

...Bob.... for.... Statistics....

This actually was a harder unit than i thought; at first i really didn't know the difference or how to use either normalcdf, or binomcdf. Later on, i learned that using binomcdf, means that the data is discrete (not involving decimals). Ie: you can't have half a person or half a light bulb. On the other hand, normalcfd deals with continous data (including decimals) aergo; questions like eating 1/5 of a sandwich can be done with normalcdf. Although i have some vague ideas on using these functions, i'll still have to review my notes. I also have to get reacquainted with using, InvNorm and ShadeNorm, since i forgot how to use them.... -_-"

In conclusion, study, study, study; i still want that 90%+ mark in this class. Goodluck to everyone.

2008-04-16T17:05:00.004-05:00

HI! This is COwMIlk How you guys prepare for the test about statistic tomorrow?? I think the important thing in this chapter is normal distribution .Follow with this is some formula :
+ Shapenorm(Low Value ,Hi value,mean,std.dev) but I think you guys should change to Z-score ^^ because that easier (I think) there's how to use shapenorm: shapenorm(Low Z-score,Hi-Z-score).
+ InvNorm(Percent) this one is easy to use ,when you have the percent ,just use this formula and u will get the Z-score,remember this percent must be from the minimum point at left of the bell Shape to right of the bell Shape .
+ And everyone must know how to calculate Z-SCORE

Binomial Distribution
When binomial distribution approached to the normal distribution (np AND nq >= 5) we can use the formula of normal distribution.
+ binomialPDF(trial,percent,x) :
Ex: flip the coint 20 times
Trial --> we have 20 letters (H or T) --> trial is 20
percent--> 1/2--> trial is 1/2
The calculator will create 20 letters ( H or T)
X(optional of this formula) :if you don't put x , the calculator will show all of your results. (all the percent .If u put x = 5,the calculator only show 1 result ,that is the percent of exactly 5 letters in 20 letters.

+ binomialCDF(trial,percent,x) : the same with formula above, but it's have a LITTLE difference :P . When we put x=5 , the calculator will add all the percent from TTT(all of T)...or (All of H) to 5 letters H in 15 letters T (or 5 letters T in 15 letters H)

That's some things i think importance ...and ...that it ^^ ...GOODLUCK

MR.K when we hand in 4 questions ?????????

BOB

2008-04-16T16:36:00.004-05:00

Dear BOB,

I just wanted to let you know that STATISTICS is the hardest unit in Applied Math 40S. So, now I need to study and analyze each problems that we did in class or as for homeworks to do better for the test tomorrow. Mr.K. has done everything he could to help us understand the concept of the following: normalCDF, normalPDF, binomPDF, binomCDF, ShadeNorm, and invNorm. But now it's our turn to apply that to the real world. That's why they called this course APPLIED MATH. Those are the keys we need to remember to be able to answer the test questions. And now I kinda understand what those functions mean. Just good luck to everyone and study and review your notes, problem questions, and quizzes to really help you succeed in the test. GOOD LUCK! Adios Amigos.

2008-04-16T16:28:00.002-05:00

Hey everyone its Michelle and this is my BOB. When I found out that we were doing statistics I almost freaked out because I know that this unit would be tricky. At the beginning of the unit I was having problems on determining on when to use binomcdf and normalcdf. I thought that I would never understand it. But after going over it many many times it finally makes sense to me. =) I know that when using binomcdf your using it because the data involved is discrete meaning not having a decimal place. For example you couldn't have half a person. And with normalcdf the data involved is continuous which has decimal places. An example would be your weight or your height and both functions you use are commulitive which is when you add up the numbers as you go along. The one thing that still hasn't made complete sense to me is when to use invNorm. So I will definitely have to look into that tonight so that I can do better on the test tomorrow. Good luck everyone, and hopefully we will all do good on tomorrows test!

Today's Slides: April 16

2008-04-16T16:07:00.003-05:00

Here they are ...

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Scribe Post for April 8th

2008-04-16T12:55:00.003-05:00

Wow this Scribe post is really late. on April 8th we learned how to use the binomcdf function on the calculator while using the binomial distribution and normal approximation.

There is a link between the normal approximation and the binomial distribution and that is if np is greater than or equal to 5 and nq is greater then or equal to 5. We also learned that if the binomial distribution can be approximated by a normal curve then we can calculate the mean and the standard deviation:

mean=np standard deviation=square root of npq.

when we use the binomcdf function we check what the question tells us like if there are a certain amounts of items and the question wants us to find out how much more than another number then we use it but if the question asks us to find the exact amount then we use the binompdf. binomcdf adds up the data because the c stands for cumulative.

thats all I remember in class that day but next time I will make sure that I am ready.

BOB - STATISTICS

2008-04-15T23:57:00.002-05:00

ok so this is my BOB for the statistics unit so here i go...
as well all know this unit is a toughy and yes i'll admit it's not my favorite =\ but since i need a good mark on this test i wanna make sure i get through it in 1 piece. Maybe after i read over everything a few times it'll stick but as of right now i feel we've learned so much that it's in my head just floating around all unorganized. one of my most biggest weaknesses is identifying when to use normalc/pdf or binomialc/pdf.. i understand when to use either cdf or pdf but it's the normal or binomial that confuses me now.

ok i'm going to go on studying since................ MR. K. I GOT MY BINDER BACK! =)

Scribe

2008-04-15T22:28:00.003-05:00

Sorry for the lateness of this post, this is the scribe for April 14, 2008.

So we talked about using a confidence interval of 95% and a margin error to answer certain questions. Like how certain we can be that the results would be approximately the same if another survey is done, and based on the results you can see what the smallest and largest numbers are.

to find a 95% interval you have to find N, the mean, and the standard deviation. you first find the margin of error which is when you multiply the magic number 1.96 by whatever the standard deviation is. If you want the percent margin of error you divide the margin of error by N. from that you subtract and add your margin of error to the mean. This finds the smallest and largest numbers you can have, thus the 95% confidence interval.

If you need any help then the slides from the 14th can help as well.

and michelle is the next scribe, but she has already completed hers.