condition mean min max ZT0-3 66.87313333333333 22.4255 91.202 ZT4-7 18.119950000000003 18.119950000000003 18.119950000000003 ZT8-11 16.67865 16.67865 16.67865 ZT12-15 24.770625 19.5217 30.01955 ZT16-19 40.5887 40.5887 40.5887 ZT20-23 74.83955 74.83955 74.83955