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[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
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