STATS week 8 6 questions

28. (AT) The dataset ADHD Treatment has four scores per subject.

 b. Create an ANOVA summary table.

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?

AT case study info: http://onlinestatbook.com/case_studies/adhd.html

63.Use the following info.

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

 H0: u1=u2=u3=u4=u5

Ha: at least any two of the group means u1, u2....u5 are not equal. 

Question:

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. (Use F distribution table) and ANOVA 

CNN 45, 12, 18, 38, 23, 35

FOX 15, 43, 68, 50, 31, 22 

Local 72, 37, 56, 60, 61 

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. (use f distribution table) and ANOVA 

White 6, 8, 2, 4, 6, 

Black 4, 1, 5, 2 

Hispanic, 7, 3, 5, 4, 6 

Asian 8, 3, 5, 1, 7 

79. 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.

Use F distribution only 

working class, 17.8, 26.7, 49.4, 9.4, 65.4, 47.1, 19.5, 51.2

professional middle incomes 16.5, 17.4, 22.0, 7.4, 9.4, 2.1, 6.4, 13.9

professional wealthy 8.5, 6.3, 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

Sat. 75, 18, 150, 94, 62, 73

Sun. 44, 58, 61, 19, 99, 60, 89

Sat. 62, 0, 124, 50, 31, 118

Sunday 137, 82, 39, 127, 141, 73 

F distribution table 

http://www.stat.purdue.edu/~jtroisi/STAT350Spring2015/tables/FTable.pdf

Answers must have explanations.