condition mean min max ZT0-3 14.44995 14.44995 14.44995 ZT4-7 13.576350000000001 13.576350000000001 13.576350000000001 ZT8-11 12.0058 12.0058 12.0058 ZT12-15 14.129950000000001 14.129950000000001 14.129950000000001 ZT16-19 12.246300000000002 12.246300000000002 12.246300000000002 ZT20-23 11.36685 11.36685 11.36685