Question: A physician would like to know the mean fasting blood glucose value (in mg/100ml) of patients seen in a diabetes clinic over the past 10

A physician would like to know the mean fasting blood glucose value (in mg/100ml) of patients seen in a diabetes clinic over the past 10 years. Determine the number of records the physician should examine in order to obtain a 90 percent confidence interval for ??if the desired width of the interval is 6 units and a pilot sample yields a variance of 60.

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