Exhibit 12-5: a Researcher Obtains Chemistry Achievement Test Scores from a Group

question 22

Multiple Choice

Exhibit 12-5: A researcher obtains chemistry achievement test scores from a group of high school students who have had laboratory experience and a group who have not.She recognizes the need to control for the variable intelligence in his study.Identify the type of control technique illustrated by the following procedures.
-Refer to Exhibit 12-5.The researcher uses only those students with IQs of 100-105.

• A) match
• B) use analysis of covariance
• C) use a homogeneous group
• D) add intelligence as an additional independent variable

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