condition mean min max ZT0-3 196.70074147500003 165.11816205 228.28332090000004 ZT4-7 59.69644887500001 52.89578045500001 66.49711729500001 ZT8-11 80.0124753075 67.988401565 92.03654904999999 ZT12-15 70.8594919825 48.65983446 93.059149505 ZT16-19 52.088673185000005 51.301098365 52.87624800500001 ZT20-23 37.600882150000004 35.341991845 39.859772455