Multiple Choice
A researcher studies the effect of exercise on stamina.Participants are randomly assigned to be in an exercise or no-exercise group for 12 weeks.Stamina is then measured by how long participants can walk comfortably on a treadmill.In this study, the dependent variable is:
A) the number of minutes on the treadmill.
B) the exercise program.
C) heart rate during the exercise program.
D) the 12-week duration of the exercise program.
Correct Answer:

Verified
Correct Answer:
Verified
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