7) All the students at a school took the SAT test. The average score on the test was an 75. A sample of all the students who were juniors and seniors of size 400 also took the test. It is found that their average was a 77. It is also found that the sample standard deviation s = 3 Compute with 1% confidence whether the juniors and seniors scored on average greater that the whole body of students of not.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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7) All the students at a school took the SAT test. The average score on the test was an 75. A sample of all
the students who were juniors and seniors of size 400 also took the test. It is found that their average
was a 77. It is also found that the sample standard deviation s = 3 Compute with 1% confidence whether
the juniors and seniors scored on average greater that the whole body of students of not.
Transcribed Image Text:7) All the students at a school took the SAT test. The average score on the test was an 75. A sample of all the students who were juniors and seniors of size 400 also took the test. It is found that their average was a 77. It is also found that the sample standard deviation s = 3 Compute with 1% confidence whether the juniors and seniors scored on average greater that the whole body of students of not.
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