Answer:
b. –1.33
Step-by-step explanation:
The z-score measures how many standard deviations a score X is above or below the mean.
It is given by the following formula:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
In which [tex]\mu[/tex] is the mean and [tex]\sigma[/tex] is the standard deviation.
In this problem, we have that:
[tex]\mu = 64, \sigma = 9, X = 52[/tex]. We have to find Z
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{52 - 64}{9}[/tex]
[tex]Z = -1.33[/tex]
So the correct answer is:
b. –1.33
