11. He described a simple experiment to estimate the composition and distribution components of the sampling variance . 12. A well-known example arises in the estimation of the population variance by sample variance . 13. I also calulate the sample variance , but this is even more susceptible to the outliers. 14. This is ( at least in the ideal case ) an unbiased estimate of the sampling variance . 15. Similarly, calculating the sample variance will result in values that grow larger as more samples are taken. 16. Bessel is responsible for the correction to the formula for the sample variance estimator named in his honour. 17. Secondly, the sample variance does not generally minimize mean squared error between sample variance and population variance. 18. Secondly, the sample variance does not generally minimize mean squared error between sample variance and population variance. 19. Let \ overline { X } and S ^ 2 be the sample mean and the sample variance . 20. Where s ^ 2 is the sample variance and \ bar { H } is the sample mean.