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Question: The means of each group of a two-way analysis of variance for two independent variables are plotted and shown in the three graphs. Which of these represents an ordinal interaction? Consider the interaction to be significant.



A ) Graph 2
B ) Both graph 1 and graph 2
C ) Graph 3
D ) Graph 1

Steps to derive

1 In an ordinal interaction, the lines do not cross each other, nor are they parallel.

2 In the above 3 graphs, graph 2 satisfies this condition.

3 So, graph 2 represents an ordinal interaction.



Hence the right answer is Option A

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