Working with an expression to get StDev

[GMFTM]

Ok, I am calculating Sales Rate in first column: Sale Rate: Count([Sales].[VIN])/Count([Offered No Dups].[VIN])

Now I have other columns with expressions and group by's.....

This is the one that is giving me fits and it is related to the above calc: Std Dev Sale Rate: StDev(Count(([Sales].[VIN])/Count([Offered_No_Dups].[VIN])))

I have tried this a few different ways with no success. Need to know the correct way to build the one for the StDev?

Thanks in advance!

 

[xenou]

Are you trying to see one result or many results? StdDev would assume you have a set of numbers to work with and gives a single number as the answer.