An interaction is observed when the effect of one variable changes at different levels of a second variable.

Name: An interaction is observed when the effect of one variable changes at different levels of a second variable.
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An interaction occurs in an experiment or analysis when the effect of one independent variable on the dependent variable differs depending on the levels of another independent variable. This means the impact of one variable is not consistent across all levels of the other variable.

An Interaction Is Observed When the Effect of One Variable