Question

Ten randomly selected people took an IQ test A, and next day they took a very similar IQ test B. Their scores are shown in the table below. Person A B C D E F G H I J Test A 100 96 89 101 72 121 105 85 111 113 Test B 101 100 89 105 73 122 108 88 109 120 1. Consider (Test A - Test B). Use a 0.01 0.01 significance level to test the claim that people do better on the second test than they do on the first. (Note: You may wish to use software.) (a) What test method should be used? A. Matched Pairs B. Two Sample t C. Two Sample z (b) The test statistic is (c) The critical value is (d) Is there sufficient evidence to support the claim that people do better on the second test? A. Yes B. No 2. Construct a 99 99 % confidence interval for the mean of the differences.

Answer 1