condition mean min max ZT0-3 417.0 417.0 417.0 ZT4-7 2568.7 2568.7 2568.7 ZT8-11 2017.8500000000001 2017.8500000000001 2017.8500000000001 ZT12-15 691.8000000000001 691.8000000000001 691.8000000000001 ZT16-19 137.0 137.0 137.0 ZT20-23 80.05000000000001 80.05000000000001 80.05000000000001