Question

A researcher collected the heights of male seniors at a high school. The data collected are normally distributed with a mean of 70.21 inches and a standard deviation of 1.35.
What is the z-score of a high school senior who is 68 inches tall?

Answer 1

Z-score formula:

z = (x - μ) / σ

Where x is the value being examined (68 inches), μ is the mean (70.21inches), σ is the standard deviation (1.35). Plug in the appropriate quantities and evaluate z.