Which Threat to Internal Validity Is Controlled in the One-Group

question 23

Multiple Choice

Which threat to internal validity is controlled in the one-group pretest-posttest design (O₁ X O₂) ?

• A) attrition
• B) testing
• C) history
• D) maturation

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A type of mutual fund or exchange-traded fund designed to replicate the performance of a specific market index.

PHStat

An Excel add-in that allows users to perform statistical analysis.

Coefficient of Variation

A statistical measure of the dispersion of data points in a data series around the mean, expressed as a percentage.

Index Fund

An investment fund designed to follow certain preset rules so that the fund can track a specified basket of underlying investments.