An experiment to determine the efficacy of a drug for reducing high blood pressure is performed using four subjects in the following way: two of the subjects are chosen at random for the control group and two for the treatment group. During the course of treatment with the drug, the blood pressure of each of the subjects in the treatment group is measured for ten consecutive days as is the blood pressure of each of the subjects in the control group.
a. In order to test whether the treatment has an effect, do you think it is appropriate to use the two-sample t test with n = m = 20?
b. Do you think it is appropriate to use the Mann-Whitney test with n = m = 20?
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