Standard Deviation and Averaging

Hi j4ymastah 

You can add a YearMonth column in your data model. Then you can achieve your goal by measure or calculate funtion in Table visual directly.

Add a YearMonth column.

YearMonth = FORMAT('Table'[LOGIN DATE - Copy],"YYYYMM")

Measure:

SD Per Month = CALCULATE(STDEV.P('Table'[Count]),FILTER(ALL('Table'),'Table'[YearMonth]=MAX('Table'[YearMonth])))

AVG Per Month = CALCULATE(AVERAGE('Table'[Count]),FILTER(ALL('Table'),'Table'[YearMonth]=MAX('Table'[YearMonth])))

Or use Average/Standard Deviation function in table visual.

Result is as below.

Best Regards,

Rico Zhou

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.