When Sample Sizes Are Equal,MS_Within Is Figured by

When sample sizes are equal,MS_Within is figured by

A) summing the population variance estimates figured within each group and dividing by the total number of participants (over all groups) .
B) summing the population variance estimates figured within each group and dividing this sum by the number of groups.
C) multiplying the within-groups sum of squares (SS_Within) by the size of each sample (n) .
D) dividing the within-groups sum of squares (SS_Within) by the size of each sample (n) .