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#1 The mean cholesterol level of a random sample of 100 adults aged 45 - 54 was 216 milligrams with a standard deviation of 19.5

#1 The mean cholesterol level of a random sample of 100 adults aged 45 - 54 was 216 milligrams with a standard deviation of 19.5 milligrams. Construct a 98% confidence interval for u, the true mean cholesterol level of adults aged 45 - 54

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