Buster Runs an Experiment in Which She Finds That Participants

question 52

Multiple Choice

Buster runs an experiment in which she finds that participants placed in a good mood by a happy film clip are more likely to offer help to a fellow participant than participants who see a sad film clip. Bob suggests that perhaps this difference simply results from the fact that the participants in the happy film clip condition were more helpful people to begin with. What methodological aspect of a successful experiment can Buster point to in order to refute this criticism?

• A) External validity
• B) Random selection
• C) Random assignment
• D) Manipulation

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Definitions:

Population Size

The total number of individuals or units in the group or set being studied.

Sample Size

This term refers to the number of observations or replicates used in a statistical analysis.

Central Limit Theorem

A statistical theory stating that the distribution of sample means approximates a normal distribution as the sample size becomes large, regardless of the population's distribution.

Sampling Distribution

The probability distribution of a given statistic based on a random sample, essential in estimating the sampling variability.