A researcher studying weight loss among overweight teenage girls wants to use a matched groups design to assess the effectiveness of three different diets.On which variable is it MOST important to match the participants?

Question

Quizplus · Accepted Answer

Matching on percent of body fat is most important because it is the variable that will likely have the most impact on weight loss. By matching participants on this variable, the groups will be more similar, and any differences in weight loss between the groups can be attributed to the diet they followed. Matching on month of birth, favorite junk food, or level of commitment may have some benefits but are not as directly related to weight loss as percent of body fat.

A Researcher Studying Weight Loss Among Overweight Teenage Girls Wants