Function: mean(sqrt(divide(numbers('epe') if numbers("per") if numbers("per") > numbers('yxy') else numbers('epe') > numbers("per") else numbers("per"), numbers("per") if numbers('yxy') > numbers("per") else numbers('epe'))), divide(numbers('epe') if numbers("per") > numbers("per") else numbers("per") if numbers('yxy') > numbers('epe') else numbers("per"), numbers('epe') if numbers("per") > numbers('yxy') else numbers("per")))
