A Study Tested the Effects of Science Fiction Movies on People's

question 26

Essay

A study tested the effects of science fiction movies on people's belief in the supernatural. A scale was designed to measure the degree that a person believes in the supernatural (high scores indicate high levels of belief). Seven participants completed the scale before and after watching a popular science fiction movie. Participants' scores are listed below. Assume that the researcher had reason to expect participants to believe less in the supernatural after watching the movie.
Belief-in-Supernatural Scores, Before and After Watching Science Fiction Movie
Carry out a t test for dependent means (using the .01 significance level).
a. Use the five steps of hypothesis testing.
b. Figure the effect size and find the approximate power of this study.

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Definitions:

Incentives

Financial or non-financial rewards offered to encourage specific behaviors or actions among individuals or organizations.

Trade

The exchange of goods or services between parties in return for other goods, services, or money.

Gains From Trade

The benefits that entities receive from the voluntary exchange of goods or services, typically leading to an improvement in overall welfare.

Street Lighting

A service provided, often by local governments, that involves the installation and maintenance of public lighting along streets and in public areas for safety and visibility.