condition mean min max ZT0-3 294.11483699999997 271.59038389999995 316.6392901 ZT4-7 209.89549770000002 203.29804925000002 216.49294615000002 ZT8-11 116.85108570999999 104.30880264499999 129.393368775 ZT12-15 47.6677823125 38.974654535 56.360910090000004 ZT16-19 80.29194884750001 68.111600645 92.47229705000001 ZT20-23 125.17305375000001 119.5603201 130.7857874