Under what circumstances would you not consider using analysis of covariance?
A) You need to try to control for all extraneous variables on which the groups may differ.
B) You have identified variables that have not been controlled for.
C) You have controlled for all the variables possible.
D) You need to reduce the unexplained variance.

Question

Quizplus · Accepted Answer

Analysis of covariance (ANCOVA) is used to control for the effects of extraneous variables. If you have already controlled for all possible variables, ANCOVA may not be necessary.

Under What Circumstances Would You Not Consider Using Analysis of Covariance