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 104 97 116 92 73 100 83 109 94 130 Test B 104 100 118 97 75 98 84 114 94 132 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. Matched Pairs B. Two Sample z C. Two Sample t (b) The test statistic is -0.259 (c) The critical value is 1.83 (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). 0.226 < ? < 3.374
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Let's denote the differences as D. D = [(-3), 2, (-2), 3, 9, 1, (-4), 2, 0, (-2)] Now, we will use the Matched Pairs t-test to analyze the data. (a) The test method that should be used is the Matched Pairs t-test. Show moreā¦
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