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MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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The Graduate Record Examination (GRE) is a test required for admission to many U.S. graduate schools. The comapny adiminsters the test with a reported mean quantitative reasoning score of 152.5 and a standard deviation of 9.

A) what is the range of scores of the 25th percentile to the 75th percentile. 

B) If the mechanical engineering department requires an applicant to be in the 80th percentile or above, what is the minimum score.

C) if an applicant scores a 170 on the test, What percentage of applicants did she score better on than?

Expert Solution
Step 1:-

Given that mean is 152.9 and standard deviation is 9. 

Let X reprehensible the applicant scores. 
Then X~N(152.9,9)

we know that, z-score= (X-mean)/s.d.

 

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