condition mean min max ZT0-3 10.12467 10.12467 10.12467 ZT4-7 14.2921025 14.2921025 14.2921025 ZT8-11 13.471822 13.471822 13.471822 ZT12-15 11.491704 11.491704 11.491704 ZT16-19 12.811506000000001 12.811506000000001 12.811506000000001 ZT20-23 13.9049675 13.9049675 13.9049675