Re: Variance Function

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Richard,

I think you are looking for data about both the variance and the standard
deviation of the array of dates. This would yield, for example, a
bell-shaped curve, like one gets when administering an intelligence test to
a sample population. Two thirds of the dates fall within +/- 1 standard
deviation of the mean date, ~95% of the dates fall within 2 standard
deviations, and so on.

I think this site does a good job of making the calculations and
equations understandable --> http://davidmlane.com/hyperstat/A16252.html .

hth,

David

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