. "sample variance" . . . . "Variance" . "scatter" . "Sample variance" . . "basic properties" . "variance" . . "variation" . . . "as measured discretely" . "standard deviation" . "variability" . . "volatility" . . "Variance" . "identity for variance" . "spread" . . . "Variance#Sample variance" . "statistical variance" . . "Bienaym\u00E9 formula" . "basic properties of the variance" . "variance of the sample mean" . . "Variance#Population variance and sample variance" . "Variance#Generalizations" . "biased sample variance" . "variances" . "sum of uncorrelated random variables" . . "mass variance" . "definition" . "is a biased estimator for the true variance" . "width" . . . "Variance#Distribution of the sample variance" . "distribution of the sample variance" . "v''ariance''" . . . "unbiassed sample variance" . "the variance of the sum is the sum of the variances" . "phenotypic variation" . "random variance" . . "properties" . . . "semivariance" . . "Extensions of this result" . "unbiased sample variance" . . "Semivariance" . "population variance" . "variance of the sum is equal to the sum of the variances" . "total variance" . "decomposition" . "vary" . "unbiased estimate" . "sample variances" .