7 Replies Latest reply on Oct 4, 2011 6:06 PM by Ahmad Fattahi

    Time weighted Standard Deviation

    priyanka.tayade

      I am trying to calculate time weighted standard deviation on  PI data. I am using formula below.  My time weighted average result matches the PI summary average but not the standard deviation.

       

      Is Pi using any different way for standard deviation calculations.

       

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