Question

Suppose you did a survey of male shoes size and the mean of that survey was size 10 with a standard deviation of 1.5. What is the z-score of a size of 7.5?

Answer 1

use the formula

z = (x-mu)/sigma

Answer 2

x = raw score
z = standard z score

mu = mean
sigma = standard deviation

Answer 3

in this case,

x = 7.5
z = unknown (for now)

mu = 10
sigma = 1.5