For the problems that follow you must follow the format listed below in order to receive credit for the problem. You will note that it includes the null hypothesis, the alternative hypothesis, calculation of the experimental t value or P-value, the decision rule and the conclusion drawn.

H0: Write the null hypothesis here

H1: Write the alternative hypothesis here

Decision Rule: Write here what would lead to the rejection of H0 --- remember the appropriate sign or signs are needed

Calculations: Determine the experimental statistic here

Conclusion: Write here the conclusion and why that particular conclusion was drawn

1. A test of abstract reasoning is given to a random sample of students before and after they completed a formal logic course. The results are given below. At the 0.05 significance level, test the claim that the mean score does not change after completing a formal logic course.

AFTER 74 83 75 80 84 63 93 84 91

BEFORE 73 77 70 77 74 67 95 83 84