Population standard deviation of levelId across the matching connection
Population standard deviation of workshopId across the matching connection
Population standard deviation of authorId across the matching connection
Population standard deviation of validationTimeAuthor across the matching connection
Population standard deviation of validationTimeGold across the matching connection
Population standard deviation of validationTimeSilver across the matching connection
Population standard deviation of validationTimeBronze across the matching connection
Population standard deviation of id across the matching connection