Answers to HW 10

Answers to HW 10 - Answers to HW 10 pages 360-364, # 4, 7,...

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Answers to HW 10 pages 360-364, # 4, 7, 8, 10, 11, 15, 16, 18, 21, and 24 4. a) An independent measures design would require two separate samples, each with 10 subjects for a total of 20 participants. b) A repeated measures design would use the same sample of n=10 subjects in both treatment conditions. c) A matched subjects design would require two separate samples with n=10 in each for a total of 20 subjects. 7. a) t = M D / s MD ; s MD = √(s 2 /n) = √(16/4) = 2 ; t = 5/2= 1.50 df = 10 so the t-critical value is 2.306 therefore we would fail to reject the null b) when the mean difference is 12 t = 12/4 = 6 we have the same critical value so we would now reject the null c) The larger the mean difference, the greater the likelihood of finding a significant difference. 8. a) t = M D / s MD ; s MD = √(s 2 /n) = √(64/4) = 4 ; t = 5/4 = 1.25 df = 3 so the t-critical value is 3.182 therefore we would fail to reject the null b) t = M D / s MD ; s MD = √(s 2 /n) = √(64/16) = 2 ; t = 5/2 = 2.5
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Answers to HW 10 - Answers to HW 10 pages 360-364, # 4, 7,...

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