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ANCOVA (assumptions (homogeniety of regression (no interaction between the…
ANCOVA
assumptions
normality
homogeneity of variance
linearity between pairs of covariates
linearity between covariate and the dv
homogeniety of regression
no interaction between the CV and the IV
regression slops are the same for all values of IVs
independence of CV and factor
IV does not predict CV
Basic idea
controlling for 1 or more covariate
=cont. variable that correlates with IV but isn't the focus
reduces the error variance compared to ANOVA
alpha= main effect for jth group
B is covariate coefficent
X is the covariate value for person i in the jth group
u= grand mean
