COMPARISON OF 2 POPULATION MEANS FOR PAIRED SAMPLES. The training center at Smythe & Wickes, a CPA firm, has developed a minicourse to improve staff understanding of loans-to-assets ratio requirements for its banking clients. The company wishes to test the effectiveness of this training course. Twelve staff members are chosen as a pilot test group. Each individual is given a pretest to determine his or her understanding of the topic. Thereafter, the group members complete the minicourse and are again tested using an alternate, but equivalent, testing tool. The paired differences are obtained by subtracting the before scores from after scores. In this way, a positive difference (D) indicates an improvement. The calculated mean of these differences is 1, suggesting that the mean change per person is +1. The standard deviation of D is 3.19. The statement of hypotheses for this study is as follows: H0:?D???0 [The minicourse is not effective]; H1:??D?> 0[The minicourse is effective]. Calculate the value of the test statistic. What is your decision?
1.031; do not reject H0.
1.086; do not reject H0.
0.314; do not reject H0.
None of the above numeric answers is correct; H0 is rejected
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