In an ANCOVA with one covariate and one independent variable, what null hypothesis is not tested?
A) The slopes are equal.
B) The intercepts for each line are equal.
C) The group means are equal
D) The slopes are all equal to 1.

Question

Quizplus · Accepted Answer

ANCOVA does not test whether the slopes are all equal to 1; it tests for equality of slopes and intercepts across groups and the effect of the independent variable on the dependent variable after controlling for the covariate.

In an ANCOVA with One Covariate and One Independent Variable