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Jun 20 at 7:56 comment added kodlu modified the variance to $\sum p_i (1-p_i),$ please revert if incorrect
Jun 20 at 7:56 history edited kodlu CC BY-SA 4.0
edited body
Feb 23, 2012 at 10:23 vote accept Stephan D.
Feb 22, 2012 at 12:35 history answered James Martin CC BY-SA 3.0