Alta Vista University is trying to evaluate the effectiveness of
Alta Vista University is trying to evaluate the effectiveness of its new freshman writing class. Each student in the class has submitted a preclass writing sample and a postclass writing sample scored by an English professor with no knowledge of which sample is preclass and which is postclass, and which student’s writing sample is being score
d. The student scores are given in the table.
Treating each student as a matched pair of subjects, and assuming that the necessary population conditions are satisfied, construct a hypothesis test to test a null hypothesis that the difference in average scores for the populations represented is 0. Use a significance level of .10.
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