When two main effects are significant, an interaction must be significant too.

Name: When two main effects are significant, an interaction must be significant too.
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Question

Quizplus · Accepted Answer

Two main effects can be significant without an interaction being significant. In fact, it is common for there to be significant main effects without a significant interaction. The presence of a significant interaction indicates that the effect of one variable on the outcome depends on the level of the other variable.

When Two Main Effects Are Significant, an Interaction Must Be