Question: A random sample of 52 persons attending a certain diet clinic was found to have lost (over a three-week period) an average of 30 pounds,

A random sample of 52 persons attending a certain diet clinic was found to have lost (over a three-week period) an average of 30 pounds, with a sample standard deviation of 11. For these data, a 99% confidence interval for the true mean weight loss by all patients attending the clinic would have the limits (?,?).

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