1. An anesthesiologist made a comparative study of the effects of acupuncture and codeine on postoperative dental pain in male subjects. The four treatments were: (1) placebo treatment, (2) codeine treatment only; (3) acupuncture treatment only; and (4) codeine and acupuncture treatment. Thirty-two subjects were grouped into eight blocks of four according to an initial evaluation of their level of pain tolerance. The subjects in each block were then randomly assigned to the four treatments. Pain relief scores were obtained for all subjects two hours after dental treatment.
2. Assuming that the randomized complete block model is appropriate, the researcher obtained the following analysis of variance table. Test whether or not the mean pain relief scores differ for the four treatment groupsusing a 0.05 level test. State the null, the alternative, the test statistics, the pvalue, and yourconclusion.