b.
Suppose that the blood cholesterol level of men aged 20 to 34 follows an approximately normal
distribution with mean μ = 188 milligrams per deciliter (mg/dl) and standard deviation a = 41 mg/dL..
Let x-bar be the sample mean blood cholesterol level in an SRS of 100 men aged 20 to 34.
a.
Describe the shape, center, and variability of the sampling distribution of x-bar for samples of
size 100. Size of 100 approx normal doet The center
Sampling is equal to population mean which is 188
Variability 4/1mg/dL and n = 100
In an SRS of size 100, find the probability that x-bar estimates u to within ± 3 mg/dL.