Run a Kruskal–Wallis test for the data of Exercise 8.37. Do these results confirm what you concluded from an analysis of variance? What overall conclusions can be drawn? Use α = .05.
Answer to relevant QuestionsSome researchers have conjectured that stem-pitting disease in peach tree seedlings might be related to the presence or absence of nematodes in the soil. Hence, weed and soil treatment using herbicides might be effective in ...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 ...Refer to Exercise 7.18. The wildlife biologist was interested in determining if the mean weight of deer raised in a zoo would be lower than that of deer raised in a more uncontrolled environment—for example, raised either ...Refer to Exercise 8.28. a. Compare the mean yields of herbicide 1 and herbicide 2 to the control treatment. Use a = .05. b. Should the procedure you used in part ( a) be a one- sided or a two- sided procedure? c. Interpret ...Refer to Exercise 8.27. a. Use a nonparametric procedure to group the suppliers based on their mean deviations. Use an experimentwise error rate of .05. b. Use the Tukey’s W procedure to group the suppliers based on ...
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