A physician compared the cholesterol levels of a representative sample of Americans who ate an American diet vs a representative sample of those who followed a Mediterranean diet. Though in some studies a Mediterranean diet has been shown to be beneficial, this was one of the first studies on an American population and the physician had made no advance predictions about the outcome. The mean, standard deviation, and sample size for each group are presented below. Use an alpha level of 0.05. American Mediterranean n = 36 n = 36 M = 230 M = 190 s = 24 S = 26

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