Kruskal Wallis

An instructor divided her class into four groups and asked them to keep track of the number of soft drinks that they consume per week. The data has been ranked and the sums determined for each group.

Soft Drinks Consumed per Week

Group A 7 10 14 12 8

Group B 4 20 6 11 9

Group C 2 5 13 15 10

Group D 3 9 16 17 18

The sums of the ranks for the four groups is as follows:

RA = 51.5 ;RB = 48.5 ;RC = 45.5 ;RD = 64.5

Complete the Kruskal-Wallis test to determine if the hypothesis that the different groups consume the same amount of soft drinks per week is valid at α = 0.05

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