Glossary Term
Z-Score
Performance MetricsEN
Definition
A method for converting an individual score into a standard form. The z-score indicates how far and in what direction an item deviates from its distribution's mean, expressed in units of standard deviation. Calculation of a z-score requires knowledge about the population's standard deviation and mean.
Extended Notes
Source: National Cancer Institute, NCI Thesaurus 26.09d, C68741. NCI definition, reproduced without modification under CC BY 4.0. Source identity and definition checked automatically on 2026-10-20. No individual clinical interpretation or human reviewer is asserted.
Also Known As
Standard ScoreZ ScoreZ-Score