condition mean min max ZT0-3 2.40262 1.43086 3.3743800000000004 ZT4-7 4.25485 4.25485 4.25485 ZT8-11 1.8008799999999998 1.8008799999999998 1.8008799999999998 ZT12-15 0 0 0 ZT16-19 4.098705 4.098705 4.098705 ZT20-23 5.348885 5.348885 5.348885