In a Correlational Study of Level of Education and Level

question 100

Multiple Choice

In a correlational study of level of education and level of depression, the investigators are trying to observe the relationship between these two variables. This type of study would differ from experimental studies in several important respects. For instance, __________.

• A) in correlational studies, it is difficult to determine what is causing what
• B) correlational studies can suffer from what is called the third-variable problem
• C) random assignment is not an option in correlational studies
• D) all of the above are correct

---

Definitions:

Marginal Cost

The expenditure associated with creating one more unit of a good or service.

Total Revenue

The complete amount of money received by a company for goods sold or services provided during a specific period.

Increasing-Cost Industry

An industry where the costs of production increase as output increases, often due to factors like resource depletion or higher input prices.

Long-Run Supply Curve

A curve showing the relationship between the price of a good and the quantity supplied over a period long enough for firms to enter or exit the market.