Analyzing Analysis of Variance: Violation of Assumptions

Analysis of variance (ANOVA) is a widely used statistical test in the behavioral and social sciences.

In a nutshell, ANOVA is used to evaluate differences between (at least) three group means to determine whether there is a “statistically significant” difference somewhere among them (i.e., a difference that is unlikely due to chance factors).

ANOVA is commonly used in conjunction with an experimental research design, in which a researcher randomly assigns participants to one of several groups and tests to see whether an experimental treatment variable leads to group differences on a given dependent measure.

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