condition mean min max ZT0-3 0.05937585125 0.0 0.1187517025 ZT4-7 0.16408538725 0.0189960165 0.309174758 ZT8-11 3.4096029490000004 1.8610342055000002 4.958171692500001 ZT12-15 4.435125242 4.2382501895 4.6320002945 ZT16-19 2.9826887935 2.9175220555 3.0478555314999998 ZT20-23 2.71205006075 2.683273389 2.7408267325