A health researcher was interested in comparing three methods of
weight loss: low-calorie diet, low-fat diet, and high-exercise
regimen. He selected 15 moderately overnight subjects and randomly
assigned 5 to each weight-loss program. The following weight
reductions (in pounds) were observed after a one-month period:
Low-fat diet: 7,6,8,8,6 low Calorie diet: 7,7,5,4,5 high exercise:
7,8,7,9,8
a) Test the null hypothesis that the extent of weight reduction
does not differ by type of weight-loss program. (Set α=.01 level)
(10 points) b)...