Between groups sums of squares

The between groups sums of squares in an ANOVA is the squared distance of the group means from the grand mean, multiplied by the number of subjects in each group (for a balanced design)

Group 1Group 2Group 3051015

Partitioning the between groups sums of squares

Calculcation

Between groups sums of squares = 4(-42 + 02 + 42) = 128