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?


-0.67

-1

-1.33

-1.67

Answer 1

I believe you need the formula \[z=\frac{x-\mu}{\sigma}\]where \(x\) is your size of 7.5, \(\mu\) is the mean, and \(\sigma\) is the standard deviation.

Answer 2

So \[z=\frac{7.5-10}{1.5}\]