Exercise 5/ Question 5

Greetings, y'all. In class yesterday, we were asked to do 3 Questions and then post 1 solution up on the blog. So here I am, Posting Question 5 on the blog. Let's get started!

Part a) of the Question is: Create a 1x5 matrix giving the wieghts of each item. Label it A.

This may seem hard being a pretty big matrix, but 1st of all; this is nothing compared to part b), and 2nd; the numbers are in order in the word part of the Question.

So going through the word part of the question we come to this matrix:

[3 5 6 8 4]

These are the numbers for each area of the project

Part b) Asks: Create a 5x7 matrix to show the number of point gained by each contestent. Label it B.

Oh my!!! This seems difficult. Oh ye of little faith. This Matrix here is simply the Table in this Question.

So your matrix B should look like this:

{[9 8 10 7 8 9 10]

[10 9 9 10 10 9 10]

[7 9 8 9 7 8 8]

[9 10 9 8 10 8 9]

[8 7 8 10 6 8 7]}

What this shows is how each child(===>) did in each category(^) for their projects.

Part c): What does the matrix product AB indicate?

This is a word answer, which should go along the lines of; The product of Matrix AB indicates the Students Final Mark for the Project.

Part d): Calculate AB and Record it. Summarize the Results of the Science Fair.

So now you take your trusty TI-83 (or maybe even an 84) and take matrix A and multiply it by Matrix B

Your answer should be: [223 231 227 229 220 216 228]

Yeah you're done, but not really. You need to summarize the results.

Just order the the numbers and match them with the student.

Good Job, and thanks for your time.

Keep rockin'

Nemo