A violation of the assumption of homogeneity of regression slopes (as well as regression planes and hyperplanes) in MANCOVA is an indication that:
A) There is a covariate by treatment (IV) interaction.
B) There is a covariate by DV interaction.
C) Neither (a) nor (b) is correct.
D) Both (a) and (b) are correct.

Question

Quizplus · Accepted Answer

A violation of the assumption of homogeneity of regression slopes in MANCOVA indicates there is a covariate by treatment (independent variable) interaction, meaning the effect of the covariate on the dependent variable changes across levels of the independent variable.

A Violation of the Assumption of Homogeneity of Regression Slopes