---
tag: 0VGPX25NXQ
kind: concept
name: Conditional variance
msc: [60A10]
sources:
  - url: https://en.wikipedia.org/wiki/Conditional_variance
    locator: lead section
same_as:
  wikidata: Q5159279
  wikipedia: Conditional variance
---

## Summary

The conditional variance of $X$ given some information measures the spread of $X$ around its conditional expectation. It is itself a random variable.
The node [[conditional variance|0F1SN93KXE]] gives the precise definition.