Mean and standard error of x distribution


Suppose that the population of heights of female college students is approximately normally distributed with the mean m of 67.26 inches and standard deviation s of 5.96 inches. A random sample of 78 heights is obtained. Show all work.

(A) Find out p(x>67.50) _

(B) Find out the mean and standard error of the x distribution

(C) Find out p(x>67.50)

(D) Why is the formula needed to solve (A) different than (C)?

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Basic Statistics: Mean and standard error of x distribution
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