[Fwd: Puzzled by the "Variance"]
- To: mathgroup at smc.vnet.net
- Subject: [mg86552] [Fwd: [mg86506] Puzzled by the "Variance"]
- From: mante <claude.mante at univmed.fr>
- Date: Thu, 13 Mar 2008 04:36:03 -0500 (EST)
Variance[] is an *unbiassed* estimator of the variance. The estimator
you are talking about was named VarianceMLE[] in version5, but seems to
have disappeared!
don = Table[RandomReal[], {5}];
Variance[don]
Biassed = Mean[(don - Mean@don)^2]
UB=Biassed*Length@don/(Length@don - 1)
Regards,
Claude
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Claude Manté
UMR CNRS 6117 LMGEM
http://www.com.univ-mrs.fr/LMGEM/
Centre d'Océanologie de Marseille
Campus de Luminy, Case 901
13288 MARSEILLE Cedex 09
tel : (+33) 491 829 127
fax : (+33) 491 829 119
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