Twenty-three overweight male volunteers are randomly assigned to three different treatment programs designed to produce a weight loss by focusing on either diet, exercise, or the modification of eating behavior. Weight changes were recorded, to the nearest pound, for all participants who completed the two- month experiment. Positive scores signify a weight drop; negative scores, a weight gain.

(a) Summarize the results with an ANOVA table.
(b) Whenever appropriate, use Tukey€™s HSD test and estimate all effect sizes, given that the means for diet, exercise, and behavior modification equal 2.75, 2.00, and 7.00, respectively.

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WEIGHT CHANGES DIET EXERCISE BEHAVIOR MODIFICATION 4 10 18 12 10 -3 12 63