표본평균과 표본분산
http://bomber0.myid.net/ (토론)님의 2011년 11월 4일 (금) 10:22 판
표본분산
n-1로 나누기 vs n으로 나누기
http://en.wikipedia.org/wiki/Variance#Population_variance_and_sample_variance
http://en.wikipedia.org/wiki/Bessel%27s_correction
비편향분산
Bessel's correction yields an unbiased estimator of the population variance
http://www.minitab.com/support/documentation/answers/Why%20is%20S2%20the%20unbiased%20estimator.pdf
편향분산