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 106 120 113 75 83 103 111 93 89 99

Test B 104 119 116 78 82 108 108 92 91 98

1. Consider (Test A - Test B). Use a 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

Answer 1