- Two important questions you should be able to answer after studying this chapter are: (1) What is a covariate? (2) Which assumptions should be met for a analysis of covariance?
- After controlling for the covariate, one can calculate the adjusted means. Adjusted means represent the scores when the covariate would not have had any influence. The mean of the adjusted means is called the adjusted grand mean. For equal sample sizes, the adjusted grand mean will be equal to the unadjusted grand mean.