A heart study asked whether the anti cholesterol drug gemfibrozil reduces heart attacks. In planning such...

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A heart study asked whether the anti cholesterol drug gemfibrozil reduces heart attacks. In planning such an experiment, the researchers must be confident that the sample sizes are large enough to enable them to observe enough hear attacks. The study planned to give gemfibrozil to about 3,500 men aged 40 to 55 and a placebo to another 3,500. The probability of a heart attack during the five-year period of the study for men this age is about 0.03. What are the mean and standard deviation of the number of heart attacks that will be observed in one group if the treatment does not change this probability? Mean (Exact answer (explained)) = 105 Standard deviation (three decimal places) = 10.092 A heart study asked whether the anti cholesterol drug gemfibrozil reduces heart attacks. In planning such an experiment, the researchers must be confident that the sample sizes are large enough to enable them to observe enough hear attacks. The study planned to give gemfibrozil to about 3,500 men aged 40 to 55 and a placebo to another 3,500. The probability of a heart attack during the five-year period of the study for men this age is about 0.03. What are the mean and standard deviation of the number of heart attacks that will be observed in one group if the treatment does not change this probability? Mean (Exact answer (explained)) = 105 Standard deviation (three decimal places) = 10.092