Two-Way ANOVA


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Example: College Drinking		< back		3 of 17		next >

You have two independent variables, which define your groups. Let’s call one variable Factor A and the other Factor B. Factor A has three groups or three “levels.” Factor B has two groups or two “levels.” This gives you a matrix of six groups.

You can get means for A1, A2, or A3 (forgetting about B group membership). Use these for the Main Effect of A. You can get means for B1 and B2 (forgetting about A group membership). Use these for the Main Effect of B. You can get 6 means for the 3 x 2 combinations. Use these for the Interaction of A and B.