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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,534

Three new (related) pages:

Random Variables - Mean, Variance and Standard Deviation

How are they? Any mistooks?

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 83,138

Hi;

Okay! Very good.

Nice example, not only informative but mouth watering also.

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,269

hi MathsIsFun,

All good.

You might consider a link from Variance on the third page to your Standard Deviation and Variance page.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,534

Thanks guys!

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**gAr****Member**- Registered: 2011-01-09
- Posts: 3,462

Hi MathsIsFun,

They're good!

You may consider adding a few lines about central moments, and tell that variance is one of those.

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,534

Good idea gAr

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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