[Solution Library] Medical: Vitamins and Cancer 99 patients who were cancer free at the time their blood was drawn later developed lung cancer. For these
Question: Medical: Vitamins and Cancer 99 patients who were cancer free at the time their blood was drawn later developed lung cancer. For these patients, the mean blood serum level of vitamin E was 10.5 mg/liter with standard deviation 3.2 mg/liter. Using this information, find a 95 % confidence interval for the mean serum level of vitamin E in the population of all persons with similar lung cancer risks.
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