Answer
FACTORS: Type of granola (regular/low-fat), Serving size label (2 servings, 1 serving, no label)
TREATMENTS: Regular granola and 2 servings, Regular granola and 1 serving, Regular granola and no label, Low-fat granola and 2 servings, Low-fat granola and 1 serving, Low-fat granola and no label.
120 subjects
Work Step by Step
a. The factors are variables whose levels are manipulated by the experimenter.
FACTORS=Type of granola (regular/low-fat), Serving size label (2 servings, 1 serving, no label)
The treatments are what is imposed on the subjects=
TREATMENTS=Regular granola and 2 servings, Regular granola and 1 serving, Regular granola and no label, Low-fat granola and 2 servings, Low-fat granola and 1 serving, Low-fat granola and no label.
If each of the 6 treatments should have 20 subjects, then we need 120 subjects in total.
