So it occured to me that at times (when being on the edge of tiering up) it is helpful to know your exact average (three digits after the comma, not the two digits that are normally displayed in your stats).
You can see this average by using your mobile device, just tap on the green "PLAY NOW"-button in the bottom right corner and select any coin room you like. Now while the game searches for an opponent you are able to admire your true average!
Of course you dont need to play a game, just quit when done looking.