Anyone already tried to create a dashboard using Standard Deviation Calculations - Square root?
The official doc isn't so clear to me.
My apologies for the long delayed response here.
Did you ever find an answer to your question posed here and get the Dashboard with the View you sought?
It may, in the end, take a bit of experimenting with the existing Views you can choose from to get what you seek.
In the meantime, in case it helps get things started should this remain unanswered, this is the search for the term "Root Mean Square" in the latest r2.8 release Wiki Documentation.
Search Results - CA Performance Management - 2.8 - CA Technologies Documentation
Do any of the documentation pages in that search result match what you're asking about here?