Question

3. Serum cholesterol levels above 200 mg/dl are considered high. A study is being planned to determine if the mean cholesterol level for adult Canadians exceeds 200. If a t-test is to be used with α= 0.05, what sample size is required to detect a mean cholesterol level as high as 218 with power .95? An earlier study estimated the standard deviation of cholesterol levels among Canadian adults to be about 58.2
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