Consider a problem with four subgroups with the sum of ranks in each of the subgroups equal to 71, 88, 82, and 79 and with subgroup sizes equal to 5, 6, 6, and 7. Complete the Kruskal-Wallis test and test the null hypothesis of equal subgroup ranks.
Answer to relevant QuestionsFor the data of Exercise 15.4, use the Kruskal-Wallis test of the null hypothesis that the population mean sales levels are identical for three box colors. Using the data of Exercise 15.8, carry out a nonparametric test of the null hypothesis of equality of population mean examination scores for freshmen, sophomores, and juniors. Consider a two-way analysis of variance with one observation per cell and randomized blocks with the following results: Compute the mean squares and test the hypotheses that between-group means are equal and betweenblock ...Four brands of fertilizer were evaluated. Each brand was applied to each six plots of land containing soils of different types. Percentage increases in corn yields were then measured for the 24 brand-soil-type ...A psychologist is working with three types of aptitude tests that may be given to prospective management trainees. In deciding how to structure the testing process, an important issue is the possibility of interaction ...
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