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STATS ANOVA questions STATS ANOVA questions
  • From Mathematics, Statistics
  • Due on 06 May, 2015 02:15:00
  • Asked On 04 May, 2015 07:18:22
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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

 

30 minutes

 

66

 

74

 
     

68

 

71

 
     

59

 

67

 
     

72

 

82

 
     

46

 

76

 

60 minutes

 

69

 

95

 
     

61

 

92

 
     

69

 

95

 
     

73

 

98

 
     

61

 

94

 
             

 

28 Refer t to the link below.. The dataset ADHD Treatment has four scores per subject. http://onlinestatbook.com/2/case_studies/adhd.html

Q1.  Is the design between- subjects or within-subjects?

Q2. Create a ANOVA summery table.

 

29.  Refer to the link below..  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?

http://onlinestatbook.com/2/case_studies/adhd.html

 

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.

Working-Class

 

Professional (middles incomes)

     

Professional (wealthy)

   
 

17.8

   

16.5

   

8.5

 
 

26.7

   

17.4

   

6.3

 
 

49.4

   

22

   

4.6

 
 

9.4

   

7.4

   

12.6

 
 

65.4

   

9.4

   

11

 
 

47.1

   

2.1

   

28.6

 
 

19.5

   

6.4

   

15.4

 
 

51.2

   

13.9

   

9.3

 

 

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.

 

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.

Saturday

Sunday

Saturday

Sunday

75

44

62

137

18

58

0

82

150

61

124

39

94

19

50

127

62

99

31

141

73

60

118

73

                                                89

 

 

61. 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. (For next two problems)

H0: μ1 = μ2 = μ3 = μ4 = μ5

: At least any two of the group means μ1, μ2, …, μ5 are not equal.

 

Q1.) Solve for x̄ and s2Above

Q1a.)  Degrees of freedom – numerator: df(num) = _________

Q2.)  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 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.

 

71.) Are the mean number of times a month a person eats out the same for whites, blacks, Hispanics and Asians? Suppose that 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.

SEE ATTACHMENT AS IT CONTAINS THE DATA FOR THE LAST 2 QUESTIONS

ALL WORK MUST BE SHOWN

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STATS ANOVA questions
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  • Submitted On 07 May, 2015 08:30:40
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10. there are five conditions, hence...
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