Three alternative regimes α, β, and ϒ involving combinations of certain exercises and drugs ·are being compared for their efficacy in the reduction of overweight in men. Fifteen volunteers were available for the trial. The trials were carried out by first dividing the subjectŠ into "matched" groups; that is, men in any group were chosen to be as alike as possible. The loss of weight after 3 months for .the three regimes was as follows:
(a) Make any analysis you feel is appropriate, including a graphical analysis.
(b) Suppose you are told that the average weight in pounds at the beginning of the trial for members in each group is as follows:
How might this affect your analysis and conclusions?