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 100 108 113 78 97 107 95 129 90 84 Test B 102 112 113 78 100 110 95 129 92 84 1. Consider (Test A - Test B). Use a 0.05 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. Two Sample t ? B. Two Sample z ? C. Matched Pairs (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 95% confidence interval for the mean of the differences. Again, use (Test A - Test B). < $\mu$ <

          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 100 108 113 78 97 107 95 129 90 84
Test B 102 112 113 78 100 110 95 129 92 84
1. Consider (Test A - Test B). Use a 0.05 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. Two Sample t
? B. Two Sample z
? C. Matched Pairs
(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 95% confidence interval for the mean of the differences. Again, use (Test A - Test B).
< $\mu$ <

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 100 108 113 78 97 107 95 129 90 84
Test B 102 112 113 78 100 110 95 129 92 84
1. Consider (Test A - Test B). Use a 0.05 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. Two Sample t
? B. Two Sample z
? C. Matched Pairs
(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 95% confidence interval for the mean of the differences. Again, use (Test A - Test B).
< μ <

Added by Derrick L.

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