A Researcher Was Conducting an Experiment on a New Method

question 71

Multiple Choice

A researcher was conducting an experiment on a new method to reduce fear of flying and did not use a control group.During this experiment,a high-profile plane crash was reported in the media.What threat to internal validity is this?

• A)history
• B)experimental mortality
• C)selection biases
• D)testing
• E)statistical regression

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Definitions:

Circular Rug

A rug in the shape of a circle, often used as a decorative piece in homes.

Radius

The measurement from the middle of a circle to a point on its outer boundary.

Percent

A ratio or fraction expressed as part of 100, used to describe proportions, rates, or relative quantities.

Unit Price

The cost per unit of quantity, making it easier to compare the cost of items that are sold in different quantities.