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QUESTION
When 40 people used Weight Watchers diet for one year, their mean weight loss was 3.0 lb and the standard deviation was 4. use a 0.
When 40 people used Weight Watchers diet for one year, their mean weight loss was 3.0 lb and the standard deviation was 4.9 lb. use a 0.01 sifnificance level to test the claim that the mean weight loss is greater than 0 lb.
When 40 people used Weight Watchers diet for one year, their mean weight loss was 3.0 lb and the standard deviation was 4.9 lb. use a 0.01 sifnificance level to test the claim that the mean weight...