Z-Score Formula

Z score formula
by Courtney Taylor
Courtney K. Taylor, Ph.D., is a professor of mathematics at Anderson University and the author of "An Introduction to Abstract Algebra."
Updated January 06, 2020

To convert any bell curve into a standard bell curve, we use the above formula. Let x be any number on our bell curve with mean, denoted by mu, and standard deviation denoted by sigma. The formula produces a z-score on the standard bell curve.