60 observations from a study on the impact of exercise and diet on body weight loss. The variables, exercise, diet, and exdiet are binary variables and the variable diff is a continuous variable.
exercise = 1 if a person exercises, 0 otherwise. diet = 1 if a person follows a diet plan, 0 otherwise. exdiet = 1 if a person exercises and follows a diet plan, 0 otherwise. diff = The difference observed in weight (in lbs.) after 3...