Ethan Has Developed a Scale to Measure a Person's Fear

question 5

Multiple Choice

Ethan has developed a scale to measure a person's fear of earthquakes. After the occurrence of an earthquake, he surveys 1000 individuals and finds the mean score to be 7.8 out of a possible 10 (the higher the score, the greater the fear) . Ethan concludes that fear increases after people experience an earthquake. This study is an example of a:

• A)true experiment.
• B)one group pretest-posttest design.
• C)control group design.
• D)one-shot case study.

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Definitions:

Optimal Output

The level of production at which a firm achieves the highest possible profit, given its cost structure and the market price.

Short-Run

A period in which at least one factor of production is fixed, and firms can only adjust variable inputs.

Supply Curve

A graph illustrating how much of a product a firm will sell at different prices.

Zero-Profit Equilibrium

A situation in competitive markets wherein, due to free entry and exit, firms only earn a normal profit, which is their lowest level of profit necessary to keep them in business.