Both over-the-counter niacin and the prescription drug Lipitor are known to lower blood cholesterol levels. In one double-blind study Lipitor outperformed niacin. The 95% confidence interval estimate of the difference in mean cholesterol level lowering was (18, 41). Which of the following is a reasonable conclusion? O Niacin lowers cholesterol an average of 18 points, while Lipitor lowers cholesterol an average of 41 points. O There is a 0.95 probability that Lipitor will outperform niacin in lowering the cholesterol level of any given individual,

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