eResources Chapter Lane et al. 15 Illowsky et al. 13 Exercise 10 17 28 29 61 63 69 71 77 81 Page* 573 574 577 577 720 720 721 722 725 726 * Page numbers are approximated due to version control of the eResources, especially for Illowsky et al. 10. If an experiment is conducted with 5 conditions and 6 subjects in each condition, what are dfn and dfe? 17. The following data are from a hypothetical study on the effects of age and time on scores on a test of reading comprehension. Compute the analysis of variance summary table. 30 mins 60 mins 12-yr olds 66 68 59 72 46 69 61 69 73 61 16-yr olds 74 71 67 82 76 95 92 95 98 94 28. (AT) The dataset ADHD Treatment has four scores per subject. a. Is the design between-subjects or within-subjects? b. Create an ANOVA summary table. D0 D15 57 27 32 31 34 38 71 33 34 53 36 42 26 52 36 55 36 42 36 54 34 29 33 33 D30 48 42 39 23 36 34 61 36 41 57 32 48 48 39 36 48 35 39 32 48 35 28 27 40 D60 64 48 34 25 42 40 59 42 36 67 29 50 44 57 36 57 30 36 41 65 35 40 43 44 62 49 30 34 38 36 77 51 45 42 43 57 36 58 35 60 33 49 33 59 35 37 45 29 29. (AT) Using the Anger Expression Index from the Angry Moods study as the dependent variable, perform a 2x2 ANOVA with gender and sports participation as the two factors. Do athletes and non-athletes differ significantly in how much anger they express? Do the genders differ significantly in Anger Expression Index? Is the effect of sports participation significantly different for the two genders? Gender Sports 2 2 2 2 1 1 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Anger-Out 18 14 13 17 16 16 12 13 16 12 12 17 18 Anger-In 13 17 14 24 17 22 12 16 16 16 13 23 19 Control-Out 23 25 28 23 26 25 31 22 22 29 24 24 29 ControlIn 20 24 28 23 28 23 27 31 24 29 25 22 30 Anger_Expression 36 30 19 43 27 38 14 24 34 18 24 42 26 1 2 1 2 2 2 2 1 1 2 2 2 2 1 1 2 2 2 2 2 2 1 1 2 1 2 2 1 1 1 2 2 1 2 2 2 1 2 1 1 2 2 2 2 2 2 2 1 2 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 27 18 9 13 20 16 23 12 15 26 17 20 9 24 12 23 14 23 13 18 11 15 20 11 16 11 15 17 18 16 14 18 11 12 18 21 22 22 26 11 17 16 9 11 17 13 18 19 15 15 18 10 14 20 25 21 24 16 21 29 21 30 19 24 20 21 14 12 26 11 19 22 27 22 26 15 19 31 22 17 21 18 13 22 13 14 22 20 17 24 15 18 18 14 23 11 22 19 15 21 22 18 23 17 28 27 15 26 15 29 29 14 16 17 21 18 26 17 22 28 27 21 25 21 16 24 30 22 21 22 27 30 20 27 32 24 19 25 17 22 15 29 28 24 32 24 21 21 27 19 25 25 20 27 11 24 24 18 26 14 15 23 13 18 14 21 13 24 14 22 23 21 19 24 16 18 25 26 16 22 19 24 30 17 20 22 22 19 19 18 23 16 19 20 22 32 16 24 21 22 19 26 24 19 35 52 25 35 56 36 58 37 40 68 61 56 39 61 31 54 30 46 24 45 32 53 56 36 23 40 51 46 32 25 43 32 27 27 42 47 55 42 67 26 35 36 7 42 31 41 36 44 33 36 45 2 2 1 2 1 1 1 2 2 2 2 2 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 12 15 14 14 15 21 18 17 24 14 10 11 15 15 16 18 14 22 15 19 19 10 19 11 18 14 17 17 31 30 27 30 27 21 24 18 18 18 30 29 20 24 32 29 23 29 27 17 23 17 23 15 32 24 18 26 Use the following information to answer the next three exercises. Suppose a group is interested in determining whether teenagers obtain their drivers licenses at approximately the same average age across the country. Suppose that the following data are randomly collected from five teenagers in each region of the country. The numbers represent the age at which teenagers obtained their drivers licenses. northeast 16.3 16.1 16.4 16.5 south 16.9 16.5 16.4 16.2 west 16.4 16.5 16.6 16.1 central 16.2 16.6 16.5 16.4 east 17.1 17.2 16.6 16.8 x = s2 = H0: 1 = 2 = 3 = 4 = 5 H: At least any two of the group means 1, 2, ..., 5 are not equal. 61. degrees of freedom - numerator: df(num) = _________ 63. F statistic = ________ 69. A researcher wants to know if the mean times (in minutes) that people watch their favorite news station are the same. Suppose that Table 13.24 shows the results of a study. 13 22 26 25 24 50 38 40 50 40 14 20 42 30 CNN 45 12 18 38 23 35 FOX 15 43 68 50 31 22 LOCAL 72 37 56 60 51 71. Are the mean number of times a month a person eats out the same for whites, blacks, Hispanics and Asians? Suppose that Table 13.26 shows the results of a study. white 6 8 2 4 6 black 4 1 5 2 hispanic 7 3 5 4 6 asian 8 3 5 1 7 77. A grassroots group opposed to a proposed increase in the gas tax claimed that the increase would hurt working-class people the most, since they commute the farthest to work. Suppose that the group randomly surveyed 24 individuals and asked them their daily one-way commuting mileage. The results are as follows. workingclass 49.4 9.4 65.4 47.1 19.5 51.2 professional (middle incomes) 22.0 7.4 9.4 2.1 6.4 13.9 professional (wealthy) 4.6 12.6 11.0 28.6 15.4 9.3 81. Is the variance for the amount of money, in dollars, that shoppers spend on Saturdays at the mall the same as the variance for the amount of money that shoppers spend on Sundays at the mall? Suppose that the Table 13.34 shows the results of a study. Saturda y 75 18 150 94 62 73 Sunday 44 58 61 19 99 60 89 Saturda y 62 0 124 50 31 118 Sunday 137 82 39 127 141 73