The Anorexia data file on the text CD shows weight change for 72 anorexic teenage girls who were randomly assigned to one of three psychological treatments. Using software, analyze these data with a nonparametric Kruskal Wallis test to compare the three weight change distributions.
a. State the hypotheses.
b. Report the test statistic and its sampling distribution.
c. Report the P-value and explain how to interpret it.