condition mean min max ZT0-3 59.805827425000004 54.88664334 64.72501151 ZT4-7 36.2425958675 32.370939785000004 40.114251949999996 ZT8-11 31.712824145 30.805278925 32.620369365 ZT12-15 18.8544629575 15.421196765000001 22.28772915 ZT16-19 23.643999530000002 19.94983132 27.338167740000003 ZT20-23 40.71273831 34.52666438999999 46.898812230000004