How do you find the variance? Calculating the variance for a data set can differ based on whether the set is the entire population or a sample of the population.

Hardeo Sahai, Satish Misra, Definitions of Sample Variance: Some Teaching Problems to be Overcome, Journal of the Royal Statistical Society. Series D (The Statistician), Vol. 41, No. 1 (1992), pp.

Tony F. Chan, Gene H. Golub, Randall J. LeVeque, Algorithms for Computing the Sample Variance: Analysis and Recommendations, The American Statistician, Vol. 37, No. 3 ...