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Goodlife fitness company, advertises that those who join will lose, on the average, 10 pounds in the first two weeks. The population standard deviation is

Goodlife fitness company, advertises that those who join will lose, on the average, 10 pounds in the first two weeks. The population standard deviation is 3.8 pounds. A random sample of 60 people who joined the new weight reduction program revealed the mean loss to be 9 pounds. Is it reasonable to conclude that those joining Weight Reducers will lose, on average, less than 10 pounds

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