Question

A physician performed an experiment to investigate the effects of exercise on students. He examined 25 volunteers and found them to be in good health. He then had the students perform exercises such as jogging and bicycling. The doctor recorded the students' pulse rates before, during, and after each activity. Which was the dependent variable in this experiment? F. the students' health G. the exercise H. the number of volunteers I. the students' pulse rates

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The correct answer is I. In this experiment, the variable that is changed (independent variable) is the type of exercise. On the other hand, the variable that is affected (dependent variable) is the pulse rate.

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