In performing a two-way ANOVA for a two-factor factorial experiment,the interaction sum of squares,SS(int),equals:
A)SST - SS(groups)- SSE
B)SST - SS(1)- SS(2)- SSE
C)SST - SSE - SS (1)
D)SST - SS(1)- SS(2)
E)SST - SSE

Question

Quizplus · Accepted Answer

The interaction sum of squares (SS(int)) is calculated by subtracting the sum of squares explained by main effects (SS(1) + SS(2)) from the total sum of squares (SST), then subtracting the residual sum of squares (SSE). Therefore, the correct formula is SST - SS(1) - SS(2) - SSE.

In Performing a Two-Way ANOVA for a Two-Factor Factorial Experiment,the