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 eight 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) the number of minutes on the treadmill.
B) the exercise program (high versus low).
C) the number of elderly patients.
D) the eight-week duration of the exercise program.

Question

Quizplus · Accepted Answer

The dependent variable is the variable being measured to see if it is affected by the independent variable. In this study, the dependent variable is the patients' stamina, which is measured by seeing how long they can walk comfortably on a treadmill, i.e., the number of minutes on the treadmill. B, C, and D are independent variables or extraneous variables that may affect the results of the study.

A Researcher Is Interested in the Effect of Exercise on Stamina