A private school promoted itself by advertising that its graduates had an average SAT verbal score of 550 (with a standard deviation of 100). At the end of the school year the Parent-Teacher Association (PTA)decided to test this contention and obtained the SAT verbal scores for 80 graduating seniors. Their average score was 532. What should the PTA conclude in regard to the school's claim if a .05 level of significance is used?
a. Use the five steps of hypothesis testing.
b. Sketch the distributions involved.
c. Figure the confidence limits for the 95% confidence interval.

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The Answer of A private school promoted itself by advertising that its graduates had an average SAT verbal score of 550 (with a standard deviation of 100). At the end of the school year the Parent-Teacher Association (PTA)decided to test this contention and obtained the SAT verbal scores for 80 graduating seniors. Their average score was 532. What should the PTA conclude in regard to the school's claim if a .05 level of significance is used?
a. Use the five steps of hypothesis testing.
b. Sketch the distributions involved.
c. Figure the confidence limits for the 95% confidence interval.

A Private School Promoted Itself by Advertising That Its Graduates