Probability and statistics
Descriptive statistics

Variance and standard deviation

  1. Variance of a population
  2. Sample variance
  3. Review and intuition why we divide by n-1 for the unbiased sample variance
  4. Simulation showing bias in sample variance
  5. Unbiased Estimate of Population Variance
  6. Another simulation giving evidence that (n-1) gives us an unbiased estimate of variance
  7. Simulation providing evidence that (n-1) gives us unbiased estimate
  8. Will it converge towards -1?
  9. Variance
  10. Statistics: Standard Deviation
  11. Exploring Standard Deviation 1 Module
  12. Exploring standard deviation 1
  13. Standard deviation
  14. Statistics: Alternate Variance Formulas

Unbiased Estimate of Population Variance