condition mean min max ZT0-3 55.59388333333333 46.77365 64.82815 ZT4-7 59.25275 59.25275 59.25275 ZT8-11 44.4241 44.4241 44.4241 ZT12-15 22.16215 21.786749999999998 22.537550000000003 ZT16-19 25.31745 25.31745 25.31745 ZT20-23 40.28515 40.28515 40.28515