Question

Given a mean of 43.8 and a standard deviation of 8.7 what is the z score of the value 40

Answer 1

$z=\dfrac{40-43.8}{8.7}\approx-0.4368$

Answer 2

Answer:

-0.44

Step-by-step explanation:

Given a mean of 43.8 and a standard deviation of 8.7

$z-score =\frac{x-mean}{standard deviation}$

mean = 43.8

standard deviation = 8.7

now plug in the values of mean and standard deviation

x= 40

$z-score =\frac{40-43.8}{8.7}$

$z-score =\frac{-3.8}{8.7}$

z-score = -0.44