A Researcher Is Interested in the Effect of Exercise on Stamina

question 141

Multiple Choice

A researcher is interested in the effect of exercise on stamina in elderly patients.The patients are randomly assigned to be in a high-exercise or low-exercise training program for 8 weeks.At the end of the program,their stamina is measured by seeing how long they can walk comfortably on a treadmill.In this study,the dependent variable is:

• A)number of minutes spent comfortably on the treadmill.
• B)the exercise program (high versus low).
• C)heart rate during the exercise program.
• D)the 8-week duration of the exercise program.