The Kruskal–Wallis test is not as highly affected by unequal variances as the AOV test. Demonstrate this result by applying the Kruskal–Wallis test to both the original and the trans-formed data and comparing the conclusions reached in this analysis for the data of Exercise 8.42.
Answer to relevant QuestionsConsider an experiment designed to compare four treatment means—μ1, μ2, μ3, and μ4—using sample sizes of size n1, n2, n3, and n4 and sample variances s21, s22, s23, and s24. a. Suppose the sample sizes are the same: ...Refer to Exercise 3.55. a. Is the average of the mean expenditures of families with three or fewer members less than the average of the mean expenditures for families with four or more members? Use α = .05. b. Which pairs ...Refer to Exercise 8.7. a. Did continuous grazing result in a greater mean soil density than the grazing regimens in which there was a no grazing period? b. How large a difference is there in the mean soil densities for the ...In the research study concerning the evaluation of interviewers’ decisions related to applicant handicap type, the raters were 70 undergraduate students, and the same male actors, both job applicant and interviewer, were ...Refer to Example 8.6. The political action group was interested in determining regional differences in the public’s opinion concerning air pollution. Write a contrast in the four population means to answer each of the ...
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