If we want to equalize initial differences between two groups before examining group differences, we would use the ANCOVA procedure.
What is ANCOVA?
- ANOVA with covariance (ANCOVA) is a generalized linear model that combines ANOVA with regression.
- ANCOVA tests whether the means of a dependent variable (DV) are the same across levels of a categorical independent variable (IV), also known as a treatment, while statistically adjusting for the effects of other continuous variables that are not of major focus, known as covariates (CV) or nuisance variables.
- ANCOVA decomposes variance in the DV mathematically into variance explained by the CV(s), total variance by the categorical IV, and residual variance.
- ANCOVA can be assumed as 'adjusting' the DV by group means of the CV (s).
- The ANCOVA procedure would be used to equalize initial differences between two teams before examining group differences.
Therefore, if we want to equalize initial differences between two groups before examining group differences, we would use the ANCOVA procedure.
Know more about ANCOVA here:
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