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User:Editeur24/standarddeviation

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standard deviation

5 foot 10 for heights.

For a new section: nonexistence of the stadnard deviation (also  for variance and mean and Cauchy articles). 

A population density must integrate to 1, as a matter of definition. (That, and be nonnegative.)

What discrete distirbutions do not have means or variacnes>?

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