15.43 Consider an experiment with treatment factors A and B, with factor A having three levels and factor B having seven levels. The results of the experiment are summarized in the following analysis of variance table:

Source of Variation Sum of Squares Degrees of Freedom Treatment A groups 21 2 Treatment B groups 96 6 Interaction 29 12 Error 390 100 Total 536 120 Compute the mean squares and test the null hypotheses of no effect from either treatment and no interaction effect.

Application Exercises