condition mean min max ZT0-3 23.722250000000003 23.722250000000003 23.722250000000003 ZT4-7 18.618250000000003 18.618250000000003 18.618250000000003 ZT8-11 22.448 22.448 22.448 ZT12-15 22.6849 22.6849 22.6849 ZT16-19 27.6881 27.6881 27.6881 ZT20-23 23.956000000000003 23.956000000000003 23.956000000000003