Refer to Exercise 8.29. In many situations in which the response is a rating rather than an actual measurement, it is recommended that the Kruskal-Wallis test be used.
In exercise

a. Apply the Kruskal-Wallis test to determine whether there is a shift in the distribution of ratings for the four groups.
b. Is the conclusion reached using the Kruskal-Wallis test consistent with the conclusion reached in Exercise 8.29 using AOV?

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Group 10 8 7.5 8 95 97.5 Group II GroupII 3 55 4 45 3 35 4 45 Group IV 2 25 3 35 2 2 7.5 8 6.5 6 5.5 5.5 3.5 44.5