condition mean min max ZT0-3 17.342183333333335 11.460450000000002 20.9875 ZT4-7 11.7716 11.7716 11.7716 ZT8-11 22.581400000000002 22.581400000000002 22.581400000000002 ZT12-15 44.500675 42.5895 46.41185 ZT16-19 41.377449999999996 41.377449999999996 41.377449999999996 ZT20-23 28.46295 28.46295 28.46295