Question

What is the z-score of sample X, if `n = 100, mu= 99, St. Dev. =43, and E[X] =95`?

Answer 1

`z=-0.9302325581`

Explanation:

The formula

`z=(x-mu)/((sigma/sqrt(n)))`

`z=(95-99)/((43/sqrt(100)))`

`z=-40/43=-0.9302325581`

God bless....I hope the explanation is useful.