The error variance is the source of variance that is external to variables or factors such as faulty measurement or other error sources.

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The error variance, also known as residual variance, refers to the variation in a dependent variable that is not explained by the independent variables or factors being studied. It is typically caused by measurement error, chance variability or other extraneous factors that are not accounted for in the research design.

The Error Variance Is the Source of Variance That Is