condition mean min max ZT0-3 1.6391149999999999 1.6391149999999999 1.6391149999999999 ZT4-7 1.82336 1.82336 1.82336 ZT8-11 1.651185 1.651185 1.651185 ZT12-15 1.1239645 1.1239645 1.1239645 ZT16-19 1.8038249999999998 1.8038249999999998 1.8038249999999998 ZT20-23 1.737425 1.737425 1.737425