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According to a recent poll. 28% of adults in a certain area have high levels of cholesterol. They report that such elevated levels could be
According to a recent poll. 28% of adults in a certain area have high levels of cholesterol. They report that such elevated levels "could be nancially devastating to the regions healthcare system" and are a major concern to health insurance providers. According to recent studies, cholesterol levels in healthy adults from the area average about 205 mg/dL, with a standard deviation of about 35 mgr'dL, and are roughly Normally distributed. Assume that the standard deviation of the recent studies is accurate enough to be used as the population standard deviation. lf the cholesterol levels of a sample 0MB healthy adults from the region is taken, 205 mg/dl. is the mean and 5.05 mg/dL is the standard deviation of the sampling distribution. Ifthe sample size were increased to 110, the standard deviation of the sampiing distribution SDl'y] would _____________ . O remain as 5.05 0 change to 3.34 0 remain as 35 0 change to 4.47
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