Scribe Post for April 8th

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

Since the matrices unit had started, i think that i had little problems like working too fast and then making little mistakes. Every time i tried to explain things in class on the board so everyone could understand a bit better i don't really think i did much help but i tried. I know i will get a good mark on the quiz tomorrow but i have to stay up and finish my homework so that i can be able to understand the transition matrices a bit better. Well that all i have to say now its back to the homework later. OH YEAH Don't forget that if you don't have a initial statement in the question, just make sure you read the questions you have to answer like in todays questions about the Oxford and Cambridge schools.

Matricies

Hi everybody. Today in class we learned a bit of vocabulary for the new unit Matricies.


These were the words for the matricies:


Matrix: numbers arranged in a rectangle contained in square brackets.


Row Matrix: [1 2 3] (numbers arranged in a row contained in square brackets.)


Column Matrix: Numbers arranged in a column contained in square brackets.


Square Matrix: [1 2 ] Numbers arranged in a matrix with equal dimensions.
[4 5 ]


Triangle Matrix: [1 2] The diagonal has two 1's but with one 0 on the other side of the diagonal
[0 1] with another number on the other side forming a triangle.


Identity Matrix: [1 0] An Identity Matrix occurs when the diagonal has two 1's and two 0's on
[0 1] the other side of the diagonal.


Address: An address is 2 points which shows the location in the matrix that shows us where the element is.


Element: An element is the exact location where the address shows.


We also learned how to add and subtract matricies.


example: when given two 2x2 matricies, you can add them but you have to also make sure that when adding, you add the same address from the other matrix to give you the Resultant matrix.


A matrix is always named with a capital letter.

Well thats about it i think so good luck remebering the vocabulary.

ha ha where you see the matricies up at the top the reason why they look like that is because I dont know how to format it properly yet sorry.

The next scribe is adamson.am40sw08