PSY 520 Topic 6 Exercise: Chapter 16, 17, 18-Latest Update

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1. Chapter 16, numbers 16.9, 16.10, 16.12 and 16.14 16.9 Given the aggression scores below for Outcome A of the sleep deprivation experiment, verify that, as suggested earlier, these mean differenc ... es shouldn’t be taken seriously by testing the null hypothesis at the .05 level of significance. Use the computation formulas for the various sums of squares and summarize results with an ANOVA table. ANOVA: Single Factor SUMMARY Groups Coun t Su m Averag e Varianc e zero 3 15 5 4 twenty-four 3 18 6 4 forty-eight 3 12 4 4 ANOVA Source of Variation SS df MS F Pvalue F crit Between Groups 6 2 3 0.75 0.512 5.1432528 5 Within Groups 24 6 4 Total 30 8 H0: μ 0 = μ 24 = μ 48 H1: H0 is false Based on this ANOVA Table we would fail to reject the null hypothesis because F=0.75 and the Fcrit = 5.14325285. 16.10 Another psychologist conducts a sleep deprivation experiment. For reasons beyond his control, unequal numbers of subjects occupy the different groups. (Therefore, when calculating in SS between and SS within , you must adjust the denominator term, n , to reflect the unequal numbers of subjects in the group totals.) (a) Summarize the results with an ANOVA table. You need not do a step-by step hypothesis test procedure. zero twenty-four forty-eight 1 4 7 3 7 12 6 5 10 2 9 1 Anova: Single Factor SUMMARY Groups Count Sum Average Variance zero 5 13 2.6 4.3 twenty-four 3 16 5.33333333 3 2.33333333 3 forty-eight 4 38 9.5 4.33333333 3 ANOVA Source of Variation SS df MS F P-value F crit Between Groups 106.05 2 53.025 13.6871414 0.0018643 0 4.256494729 Within Groups 34.8666666 7 9 3.87407407 4 Total 140.916666 7 11 H0: μ 0 = μ 24 = μ 48 H1: H0 is false Based on this ANOVA Table we would [Show More]

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