Research Methods for the Behavioral Sciences (MindTap Course List)
Research Methods for the Behavioral Sciences (MindTap Course List)
6th Edition
ISBN: 9781337613316
Author: Frederick J Gravetter, Lori-Ann B. Forzano
Publisher: Cengage Learning
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Chapter 11, Problem 10E

A two-factor analysis of variance is used to evaluate the significance of the mean differences for the two-factor research study shown in the following table. The study is evaluating the effects of sugary versus nonsugary snacks on the activity level of preschool children. Identify the three F-ratios and, using the following data from a 2 × 2 design, identify the means (or mean differences) that are compared by each F-ratio.

Before Snack After Snack
Sugary snack M = 20 M = 24 M = 22
Nonsugary Snack M = 22 M = 26 M = 24
Overall M = 21 M = 25

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