Question

question 38
1 pts
the mean of a set of scores is 24. the standard deviation is 4. what is the z - score for 18?
-2.5
-1.5
0.5
2.5

Explanation:

Step1: Recall z - score formula

$z=\frac{x-\mu}{\sigma}$

Step2: Substitute values

$z=\frac{18 - 24}{4}=\frac{-6}{4}=-1.5$

Answer:

B. -1.5