Question

What is the z-score of sample X, if `n = 54, mu= 11, St. Dev. =33, and mu_X =14.5`?

Answer 1

`z=0.78`

Explanation:

`SE =sigma/sqrtn=33/sqrt54=33/7.35=4.49`

`z=(mu_x-mu)/(SE)=(14.5-11)/4.49=3.5/4.49=0.78`