Suppose a National Survey of College Students Includes Measures of Depression

question 9

Short Answer

Suppose a national survey of college students includes measures of depression and the amount of exercise that a student gets. The survey shows that students who exercise frequently tend to be less depressed than students who seldom exercise.
a. What do these data reveal about the causal relationship between amount of exercise and depression?
b. Can you conclude that lack of exercise is a cause of depression?

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Definitions:

Futures Contract

A contractual arrangement to purchase or sell a specified asset, like a commodity or financial instrument, at an agreed-upon price on a future date.

Bushels

A unit of volume that is used primarily for measuring quantities of grain.

Soybeans

A type of legume native to East Asia, widely grown for its edible bean which has numerous uses, including oil production and as a protein source in animal feeds and various food products.

Contract Price

The price agreed upon in a contract for the purchase or sale of an asset, service, or other commodity.