According to a recent poll, 26% in a certain area have high levels of cholestero

Question

According to a recent poll, 26% in a certain area have high levels of cholesterol. They report that such elevated levels "could be financially 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 208 mg/dL with a standard deviation of about 35 mg/dL, and are roughly Normally distributed lf the cholesterol levels of a sample of 48 healthy adults from the region is taken, answer parts (a) through (d) (a) What shape will the sampling distribution of the mean have? A. The sampling distribution of the mean is normal. B. The sampling distribution of the mean is skewed right. C. The sampling distribution of the mean is skewed left. D. There is not enough information to determine the shape of the sampling distribution. (b) what is the mean of the sampling distribution? mu = mg/dL. (c) What is the standard deviation? SD(y) = mg/dL. (d) lf the sample size were increased to 110, how would your answers to parts (a) (c) change? For part (a) the shape of the distribution would For part (b) the mean of the sampling distribution would mu = mg/dL. For part (c) the standard deviation of the sampling distribution would SD(y) = mg/dL.

Explanation / Answer

Part-a –Option-A as sample size n>30

Part-b-Mean=208

Part-c SD=35/sqrt(48)=5.05

Part-d Shape is normal

Be same as µ=208

Less than SD=35/sqrt(110)=3.34

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