If factor A produces a main effect in a two-factor between-subjects analysis of variance, then will increase in value relative to MSError.
A)MSA
B)MSB
C)MSA × B
D)both MSA and MSA × B

Question

Quizplus · Accepted Answer

If factor A produces a main effect, it means that there is a significant difference in the means of the groups created by varying levels of factor A. This difference contributes to the variance between the groups, which is captured in the numerator of the F-ratio for factor A. Therefore, the increase in variance between the groups will be reflected in an increase in MSA relative to MSError. The other choices (B and C) refer to the other factor and the interaction, respectively, and are not relevant to the main effect of factor A.

If Factor a Produces a Main Effect in a Two-Factor