According to a recent poll, 26% of adults 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 210 mg/dl, with a standard deviation of about 20 mg/dl, and are roughly normally distributed. if the cholesterol levels of a sample of 42 healthy adults from the region is taken, answer parts (a) through (d).
(a) what shape will the sampling distribution of the mean have? a = skewed left, b = skewerd right, c = mean is normal, d = not enough information
(b) what is the mean of the sampling distribution?
(c) what is the standard deviation?
(d) if the sampling size were increased to 100, how would your answers to parts (a) - (c) change?
-for part (a), the shape of the distribution would? a = also be normally distributed, b = become skewed left, c = become skewed right
- for part (b), the mean of the sampling distribution would? a = change to, b = remain as if it is suppose to change, what is the new sampling distribution?
-for part (c), the standard deviation of the sampling distribution would? a = change to, b = remain as if it is suppose to change, what is the new standard deviation?