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Three-way ANOVA

1 Three-way ANOVAD ivide and conquerGeneral Guidelines for Dealing with a 3-way ANOVA ABC is significant: Do not interpret the main effects or the 2-way interactions. Divide the 3-way analysis into 2-way analyses. For example, you may conduct a 2-way analysis (AB) at each level of C. Follow up the two-way analyses and interpret them. Of course, you could repeat the procedure for, say, the AC interaction at different levels of ANOVA ABC is NOT significant, but all of the 2-way interactions (AB, AC, & BC) are significant: You may follow up and interpret the two way interactions, but not the main effects.

Three-way ANOVA Divide and conquer General Guidelines for Dealing with a 3-way ANOVA • ABC is significant: – Do not interpret the main effects or the 2-way interactions. – Divide the 3-way analysis into 2-way analyses. For example, you may conduct a 2-way analysis (AB) at each level of C. – Follow up the two-way analyses and interpret them.

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