condition mean min max ZT0-3 38.495599999999996 38.495599999999996 38.495599999999996 ZT4-7 29.560299999999998 29.560299999999998 29.560299999999998 ZT8-11 22.02975 22.02975 22.02975 ZT12-15 29.2992 29.2992 29.2992 ZT16-19 33.1368 33.1368 33.1368 ZT20-23 41.36825 41.36825 41.36825