Standard distribution

Assume that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches. A random sample of 16 heights is obtained.
d. Find the mean and standard error of the xbar distribution.
e. Find P (xbar > 70)
f. Find P ( xbar < 67)
I know that I am working with sampling distributions of sample means.

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