condition mean min max ZT0-3 22.2911 10.71395 28.455849999999998 ZT4-7 9.086845 9.086845 9.086845 ZT8-11 9.56457 9.56457 9.56457 ZT12-15 16.873525 15.60965 18.1374 ZT16-19 20.625149999999998 20.625149999999998 20.625149999999998 ZT20-23 35.362700000000004 35.362700000000004 35.362700000000004