condition mean min max ZT0-3 81.32329999999999 81.32329999999999 81.32329999999999 ZT4-7 109.82650000000001 109.82650000000001 109.82650000000001 ZT8-11 37.0994 37.0994 37.0994 ZT12-15 19.37505 19.37505 19.37505 ZT16-19 12.83895 12.83895 12.83895 ZT20-23 31.74125 31.74125 31.74125