What Is the Important Difference Between the Posttest-Only Control-Group Design

question 93

Multiple Choice

What is the important difference between the posttest-only control-group design and the posttest-only design with nonequivalent groups?

• A) The former uses random assignment of participants to groups
• B) The former uses two groups of participants
• C) The latter involves testing participants twice
• D) The latter does not manipulate an independent variable

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Definitions:

Level Of Significance

A threshold in statistical testing that determines if the evidence is strong enough to reject the null hypothesis.

Diets

Regulated eating plans designed to achieve certain health or fitness goals, such as weight loss, muscle gain, or disease management.

Weight Gain

An increase in body weight over time, which can result from various factors including diet, exercise, health conditions, or genetics.

Wilcoxon Signed-Rank Test

A non-parametric statistical test used to compare two related samples, matched samples, or repeated measurements on a single sample to assess whether their population mean ranks differ.