Main content

### Course: Statistics and probability > Unit 3

Lesson 6: More on standard deviation- Why we divide by n - 1 in variance
- Simulation showing bias in sample variance
- Simulation providing evidence that (n-1) gives us unbiased estimate
- Unbiased estimate of population variance
- Review and intuition why we divide by n-1 for the unbiased sample variance

© 2024 Khan AcademyTerms of usePrivacy PolicyCookie Notice

# Why we divide by n - 1 in variance

Another visualization providing evidence that dividing by n-1 truly gives an unbiased estimate of population variance. Simulation at: http://www.khanacademy.org/cs/unbiased-variance-visualization/1167453164. Created by Sal Khan.

## Want to join the conversation?

No posts yet.