A Researcher Is Interested in the Effect of Exercise on Stamina

question 135

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 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.

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Definitions:

Price

The amount of money required to purchase a good or service.

Demand

How much of a good or service buyers intend and can afford to buy across different prices within a set timeframe.

Marginal Revenue Product

The increase in revenue generated from the use of one more unit of a factor of production.

Perfect Competitor

A theoretical market structure where many firms sell identical products, allowing no single firm to influence market prices.