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Question

The Kruskal-Wallis test is to be used to determine whether there is a significant difference in the satisfaction rating (alpha = 0.05) between three brands of boxed cake mix. Shoppers were asked to rate their satisfaction on various attributes and an aggregate satisfaction score ranging from 1-50 was computed. The following data were obtained:
Cake Mix A 19 21 25 22 33
Cake Mix B 30 24 28 31 35
Cake Mix C 39 32 41 42 27

For this test, how many degrees of freedom should be used?
a) 3
b) 2
c) 4
d) 8
e) 1

Answer

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