In a completely randomized (one-way) analysis of variance problem with c groups and a total of n observations in all groups, the variance between groups is equal to
A) (Total sum of squares) − (Sum of squares within columns).
B) (Sum of squares between columns)/(c − 1).
C) (Total sum of squares) − [(Sum of squares within columns)/(n − c)].
D) [(Total sum of squares)/(n − 1)] − [(Sum of squares between columns)/(c − 1)].

Question

Quizplus · Accepted Answer

Since you are concerned with the variance between the groups, you are specifically looking for the denominator that contains the number of groups. You are not concerned with the number of observations in the group.

In a Completely Randomized (One-Way) Analysis of Variance Problem with C