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In Figure 11.5, we show three combinations of main effects and interactions for a 2 × 2 factorial design. Using the same 2 × 2 structure, with factor A defining the rows and factor B defining the columns, create a set of means that produce each of the following patterns:
a. A main effect for factors A and B, but no interaction.
b. A main effect for factor A and an interaction, but no main effect for factor B.
c. A main effect for both factors and an interaction.
FIGURE 11.5
Three Possible Combinations of Main Effects and Interactions in a Two-Factor Experiment.
(a) Data showing a main effect for factor A but no main effect for factor B and no interaction.
(b) Data showing main effects for both factor A and factor B but no interaction.
(c) Data showing no main effect for either factor, but an interaction.
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Chapter 11 Solutions
Research Methods for the Behavioral Sciences (MindTap Course List)
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College Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning