Refer to Exercise 9.17. Use a multiple- testing procedure to determine at the a = .05 level which of the contrasts is significantly different from zero. Interpret your findings relative to the researchers’ question about finding the most effective weight- loss method.
In exercise
A1: Drug therapy with exercise and counseling
A2: Drug therapy with exercise but no counseling
A3: Drug therapy with counseling but no exercise
A4: Drug therapy with no exercise and no counseling