The distribution of serum cholesterol values

Reference no: EM13910629

Suppose the distribution of serum cholesterol values in undergraduate men is approximately normally distributed with mean μ = 190 mg/dl and standard deviation σ = 40 mg/dl.

a) What is the probability of selecting someone at random from this population who has a cholesterol value that is less than 180?

b) You take a simple random sample of n = 49 individuals from this population and calculate the mean cholesterol of the sample. Describe the sampling distribution of x-bar?

c) Regarding the mean derived from a sample of n = 49, what is the probability of getting a sample mean that is less than 180? Hint: (Determine P(x-bar ≤ 180).

Reference no: EM13910629

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