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....

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. Is there enough evidence to reject the
claim?

Soft Drinks Consumed per Week

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

R_A

= 51.5;
R_B

= 48.5;
R_C

= 45.5;
R_D

= 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

a
= 0.05.