In a Nonequivalent Control Group Design, an Analysis of Covariance

Multiple Choice

In a nonequivalent control group design, an analysis of covariance

A) removes the effects of all pre-existing group differences.
B) indicates what the posttest means would look like if known pre-test differences between groups are removed.
C) has lower power than an analysis of variance design.
D) is the appropriate statistic for studies that use a matching procedure.