Management training programs are often conducted in order to teach supervisory skills and thereby increase productivity. An industrial psychologist at a large company administers a similar test to six supervisors before and after a training program. The tests are designed to measure whether the training program significantly increased supervisory skills. Use =0.01. X1 =Before Training X2 =After Training 1 63 78 2 84 85 3 91 99 4 71 82 5 80 78 6 83 84 D=X2 - X1 D2=(X2 - X1)2 D = D2 = D = D=After Training - Before Training = D=X2 - X1 17. State the Alternative Hypothesis A B C D H A : D 0 H A : D 0 H A : D 0 H A : D 0 E None of the above 18. Determine the mean D of the differences D=X2 - X1. A -5.67 B 5.67 C 3.67 D -8.43 E None of the above 19. Compute the standard deviation of the differences A 6.01 B 5.78 C -6.68 D 6.68 E None of the above 20. What critical value should be used at = 0.01? A 4.032 B 3.707 C 3.365 D 3.143 E None of the above 21. Determine the test statistic A2.08 B 1.34 C 3.39 D -2.00 E None of the above 22. What is the p-value? A 0.0460 B 0.4603 C 0.0921 D -0.0460 E None of the above 23. At =0.01 the correct decision and conclusion are A Reject H0, the training program significantly increased supervisory skills. B Do not reject H0, the training program did not significantly increase supervisory skills. C Reject H0, the training program did not significantly increase supervisory skills. D Do not reject H0, the training program significantly increased supervisory skills. E Insufficient information to make a decision