condition mean min max ZT0-3 3220.9 3220.9 3220.9 ZT4-7 3698.0 3698.0 3698.0 ZT8-11 3570.0 3570.0 3570.0 ZT12-15 3755.8999999999996 3755.8999999999996 3755.8999999999996 ZT16-19 3511.7 3511.7 3511.7 ZT20-23 3242.5 3242.5 3242.5