Stats assignment Week 8

Question: #9026

Stats assignment week 8

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

12 Year Olds16 Year Olds

6674

6871

30 Mins5967

7282

4676

6995

6192

60 Mins6995

7398

6194

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.

Assume that all distributions are normal, the four population standard deviations are approximately the same, and the data were collected independently and randomly. Use a level of significance of 0.05.

CNNFOXLOCAL

451572

124337

186856

385060

233151

3522

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. Assume that all distributions are normal, the four population standard deviations are approximately the same, and the data were collected independently and randomly. Use a level of significance of 0.05.

White Black HispanicAsian

6478

8133

2555

4241

6 67

77. A grass roots 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.

Determine whether or not the variance in mileage driven is statistically the same among the working class and professional (middle income) groups. Use a 5% significance level.

Working Class Professional (middle incomes)Professional (wealthy)

17.816.58.5

26.717.46.3

49.4224.6

9.47.412.6

65.49.411

47.12.128.6

19.56.415.4

51.213.99.3

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.

SaturdaySunday SaturdaySunday

754462137

1858082

1506112439

941950127

629931141

736011873

Solution: #9057

Stats assignment Week 8

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 12 Year Olds 16 Year Olds 66 74 68 71 30 Mins 59 67 72 82 46 76 69 95 61 92 60 Mins 69 95 73 98 61 94 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 favorit...