A randomly chosen subject arrives for a study of exercise and fitness. Consider

Question

A randomly chosen subject arrives for a study of exercise and fitness. Consider these statements. After 10 minutes on an exercise bicycle, you ask the subject to rate his or her effort on the Rate of Perceived Exertion(RPE) scale. RPE ranges in whole-number steps from 6 (no exertion at all) to 20 (maximum exertion) You measure VO2, the maximum volume of oxygen consumed per minute during exercise, VO2 is generally between 2.5 liters per minute and 6 liters per minute. You measure the maximum heart rate (beats per minute). The statement that describe a discrete random variable are

Explanation / Answer

Option (d) is Correct.

Since Rate of Perceived Exertion (RPE) range from 6 to 20, these are integer values 6,7,8,...20. So these are finit countable random values.

Therefore, RPE is discrete Random variable.

Since hear rate (per minite) range generally from 60 to 100. These rates show finite countable random values.

This variable is also discrete radom variable

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