condition mean min max ZT0-3 95.516751 95.516751 95.516751 ZT4-7 259.67938350000003 259.67938350000003 259.67938350000003 ZT8-11 757.035118 757.035118 757.035118 ZT12-15 584.8122735 584.8122735 584.8122735 ZT16-19 745.274357 745.274357 745.274357 ZT20-23 658.0494209999999 658.0494209999999 658.0494209999999