What is the role of interaction effects in a two-way ANOVA?

  • They calculate the variance within each group
  • They correct for multiple comparisons
  • They show how the levels of one independent variable affect the effect of the other variable on the dependent variable
  • They show the distribution of residuals
In a two-way ANOVA, interaction effects show how the levels of one independent variable affect the effect of the other variable on the dependent variable. Essentially, it shows whether the effect of one independent variable depends on the level of the other independent variable.
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