Unit Test 8

Unit Test 8 - Unit 08 Readiness Test Version C Note To turn...

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Unit 08 Readiness Test Version C Note:   To turn in the answers for grading, you have to copy your commands and the corresponding  answers from the Matlab command window and paste it into a Word Document. 1.   Define 4 variables a,b,c,d as the height of 4 different people in inches (make up the values if you like,  but be realistic) and calculate the standard deviation of the data set from MATLAB's the command  line. (hint: google 'standard deviation' if you cannot remember the formula.  Wikipedia has a nice  example.)   a=54; b=55; c=60; d=49; e=(a+b+c+d)/4; sqrt(((a-e)^2+(b-e)^2+(c-e)^2+(d-e)^2)*(1/4))                 2.   Define a 3 by 3 matrix as  A  and then determine both the transpose and inverse matrices. Prove the  inverse matrix is indeed  A -1  by showing the product of  A  and its inverse matrix is the identity matrix.  (i.e.  A*A -1 =I ) A=[1 2 3;4 5 6;7 8 9];

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