Talk:Algorithms for calculating variance: Difference between revisions

Revision as of 16:12, 11 November 2004

Revision as of 15:14, 11 May 2005

Line 47:

:The above algorithm does not seem to be correct. The resulting variance does not equal either one of the variances whose formulas are given at the top of the page. --137.226.12.196

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I had a look at the source for AlexCs algorithm. I believe there is a mistake:

var=(sum2-sum/n)/(n-1)

should read

var=(sum2-sum*sum/n)/(n-1)

The result of this algorithm agrees with my graphic calculator.

I think the corrected algorithm should be added to the page

-- [e-mail] who still hasn't got a wikipedia account :)