Glossary Term
Variance
Performance MetricsEN
Definition
A measure of the variability in a sample or population. It is calculated as the mean squared deviation (MSD) of the individual values from their common mean. In calculating the MSD, the divisor n is commonly used for a population variance and the divisor n-1 for a sample variance.
Extended Notes
Source: National Cancer Institute, NCI Thesaurus 26.09d, C48918. NCI definition, reproduced without modification under CC BY 4.0. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Also Known As
Variance
References
- NCI Thesaurus 26.09d — Variance (C48918)
- Source: National Cancer Institute, NCI Thesaurus 26.09d, C48918. NCI definition, reproduced without modification under CC BY 4.0.
- Shared variance across FrACT visual tasks: Robust positive associations but inconclusive latent structure. — Atten Percept Psychophys, 2026-10-20 (PMID 42902088; literature)