A completely randomized double-blind clinical trial was conducted to compare two drugs, ticrynafen (T) and hydrochlorothiazide (H), for effectiveness in treatment of high blood pressure. Each drug was given at either a low or a high dosage level for six weeks. The accompanying table shows the results for the drop (baseline minus final value) in systolic blood pressure (mm Hg).20 SS(interaction) = 31.33, and SS(within) = 30648.81.
(a) Construct the ANOVA table.
(b) Carry out a test of the null hypothesis that the effects of the two drugs (T and H) are equal. Let a = 0.05.