Question

If a data set has mean of 150 and a standard deviation of 25, what is the z-score of an element with a value of 250?

Answer 1

Z-score is 4

Explanation:

N(150, 25^2)

Use z-score formula (can be found from internet with miu and sigma symbol)

`z = (250 - 150)/(25) \\ z = (100)/(25) \\ z = 4`