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Suppose that people usually lost about 15 pounds when they are on a diet for six months, with a standard deviation of 4 pounds .

  1. Suppose that people usually lost about 15 pounds when they are on a diet for six months, with a standard deviation of 4 pounds. A sample of 20 adults (10 males and 10 females) enrolled in a weight control program. The mean weight loss for the sample is 16 pounds after six months. Is this sample representative of the population with respect to the number of pounds lost?

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