In an Experiment, Participants Are Randomly Assigned to Treatment Conditions

question 3

Multiple Choice

In an experiment, participants are randomly assigned to treatment conditions ____.

• A) to help protect the internal validity of the study
• B) to help protect the external validity of the study
• C) to help protect both the internal and external validity
• D) as an alternative to manipulation of variables

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Definitions:

Normal Model

A type of statistical distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Annual Snowfall

The total amount of snowfall recorded at a specific location over the course of a year.

Unusually Low

Describes values or measurements that are significantly lower than what is typical or expected within a given dataset or situation.

Normal Model

A commonly used probability distribution characterized by its bell-shaped curve, symmetric about the mean and describing many natural phenomena.