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Homework answers / question archive / Assume that a researcher used a 2 × 2 factorial design to study how diet and exercise affect weight loss
Assume that a researcher used a 2 × 2 factorial design to study how diet and exercise affect weight loss. Here are the results, expressed in pounds lost after six months, for the four treatment combinations:
(a) both diet and exercise, 10; (b) neither diet nor exercise, 0; (c) diet but no exercise, 2; (d) no diet but exercise, a. Form a table showing the means for each “cell.”
b. Graph the results.
c. Evaluate each main effect and the interaction effect using the guidelines describe in this chapter.
d. Repeat a through c above, substituting the following cell means, respectively:
10, 0, 0, 10.
e. Can you enter values into a blank 2 × 2 table above so that the values satisfy this outcome:
“No main effect for diet but a main effect for exercise and an interaction”?
