Microsoft SQL Server Analysis Services Function Page
Function Name:	VarP
Category:	Statistical
Description:	The VarP function uses the biased population formula to return the sample variance of a numeric expression that is evaluated over a supplied set.
Syntax:	VARP( «Set»[, «Numeric Expression»] )
Technet Link:	MDX VarP Function

The query below returns the sample variance for Sales Amount across all State-Province members using the biased formula.   WITH       MEMBER [Measures].[Vp] AS       VARP([Geography].[Geography].[State-Province].Members, [Measures].[Sales Amount]) SELECT       {[Measures].[Vp]} ON COLUMNS       FROM       [Adventure Works]