condition mean min max ZT0-3 3.0661310000000004 0.6832130000000001 6.647320000000001 ZT4-7 5.5713 5.5713 5.5713 ZT8-11 2.68039 2.68039 2.68039 ZT12-15 1.3044380000000002 0.8153360000000001 1.7935400000000001 ZT16-19 0.6551485 0.6551485 0.6551485 ZT20-23 0.1239205 0.1239205 0.1239205