When interactions are present in an experiment,main effects have little meaning.

Question

Quizplus · Accepted Answer

Interactions between variables mean that the effect of one variable on the outcome may depend on the level of another variable. In such cases, main effects (the effect of each variable on the outcome separately) may not accurately reflect the true relationship between the variables. Therefore, in the presence of interactions, main effects may have little meaning.

When Interactions Are Present in an Experiment,main Effects Have Little