Question

question 39
1 pts
the mean of a set of scores is 24. the standard deviation is 4. what is the z - score of 34?
-1
1.5
2.5
3.0

Explanation:

Step1: Recall z - score formula

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

Step2: Substitute values

$z=\frac{34 - 24}{4}=\frac{10}{4}=2.5$

Answer:

C. 2.5