Z score definition by American Heritage Dictionary
noun StatisticsThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A measure of the distance in standard deviations of a sample from the mean.
z score - Business Definition
In statistics, a Z score represents the number of standard deviations that a particular value of a variable is from the mean. The Z score = [(specific value of a variable) - (mean of the variable)] ÷ (standard deviation of the variable). A Z score indicates how different a specific value is from the mean. Also called standard score, Z value.