condition mean min max ZT0-3 716.146998 716.146998 716.146998 ZT4-7 328.064164 328.064164 328.064164 ZT8-11 396.8251795 396.8251795 396.8251795 ZT12-15 452.203128 452.203128 452.203128 ZT16-19 173.1492475 173.1492475 173.1492475 ZT20-23 104.18069799999999 104.18069799999999 104.18069799999999