# Law of total variance

This English edition is an AI candidate and does not yet have an OCME Atlas (GPT-6) Twin closure receipt.

[Catalogue presentation and source-binding data](https://ocme.evemisslab.com/data/i18n/catalogue.en.json)



## [Law of total variance](https://ocme.evemisslab.com/en/atlas/atlas-law-of-total-variance/)

For the same finite law and partition-generated G, total variance is the expected within-cell variance plus the variance of the cell means.

atlas-law-of-total-variance · canonical_mko

[Law of total variance](https://ocme.evemisslab.com/en/mko/mko-law-of-total-variance/)

## Prerequisite nodes


- [Law of total expectation](https://ocme.evemisslab.com/en/atlas/atlas-law-of-total-expectation/)
- [Variance in finite probability models](https://ocme.evemisslab.com/en/atlas/atlas-variance/)
- [Finite conditional expectation](https://ocme.evemisslab.com/en/atlas/atlas-conditional-expectation/)