condition mean min max ZT0-3 39.866779657500004 37.01348083 42.720078485 ZT4-7 24.1091766425 22.840544635 25.37780865 ZT8-11 35.86741174 26.713396510000003 45.02142697 ZT12-15 39.20970388 34.389348670000004 44.030059089999995 ZT16-19 45.879116752499996 45.730468445 46.02776506 ZT20-23 48.5717276375 48.51435257 48.629102704999994