Analysis of Covariance, a statistical technique that combines ANOVA with regression analysis to control for the effects of continuous variables (covariates) when comparing group means. It increases statistical power by reducing error variance.
Acronym from 'analysis of covariance,' developed as an extension of ANOVA in the mid-20th century. Combines the ANOVA framework with 'covariance,' from co- (together) plus variance, indicating variables that vary together.
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