Use the following information for questions:
43 sedentary adults between the ages of 50 and 76 were randomly assigned to either an exercise program four times a week for 16 weeks or they continued to be sedentary (King, et al, JAMA, January 1, 1997,pp 32-37). The exercise group slept an average of 42 minutes a night longer than the control group.
-What is the explanatory variable in the study?
A) Amount of food eaten (calories) per day
B) Following an exercise program four times a week for 16 weeks (or not)
C) Amount of sleep per night
D) Age

Question

Use the following information for questions:
 43 sedentary adults between the ages of 50 and 76 were randomly assigned to either an exercise program four times a week for 16 weeks or they continued to be sedentary (King, et al, JAMA, January 1, 1997,pp 32-37). The exercise group slept an average of 42 minutes a night longer than the control group.
-What is the explanatory variable in the study?
A) Amount of food eaten (calories) per day
B) Following an exercise program four times a week for 16 weeks (or not)
C) Amount of sleep per night
D) Age

Quizplus · Accepted Answer

The explanatory variable is the one that is manipulated or varied to observe its effect on another variable. In this study, the variable that was manipulated is whether participants followed an exercise program four times a week for 16 weeks or not.

Use the Following Information for Questions