ten randomly selected people took an iq test a and next day they took a very similar iq test b t

Step 1: Calculate the mean and standard deviation of the differences between Test A and Test B s

Question

Ten randomly selected people took an IQ test A, and the next day they took a very similar IQ test B. Their scores are shown in the table below. Person Test A Test B A 108 109 B 114 115 C 127 127 D 110 115 E 101 105 F 77 75 G 99 101 H 96 100 I 82 85 J 89 91 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 z C. Two Sample t (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. No B. Yes

          Ten randomly selected people took an IQ test A, and the next day they took a very similar IQ test B. Their scores are shown in the table below.

Person   Test A   Test B
A            108         109
B            114         115
C            127         127
D            110         115
E            101         105
F              77           75
G            99           101
H            96           100
I              82           85
J             89           91

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 z C. Two Sample t
(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. No B. Yes

Added by Thomas E.

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