condition mean min max ZT0-3 0.3834965 0.3834965 0.3834965 ZT4-7 0.311107 0.311107 0.311107 ZT8-11 1.5354800000000002 1.5354800000000002 1.5354800000000002 ZT12-15 0.616898 0.616898 0.616898 ZT16-19 1.059382 1.059382 1.059382 ZT20-23 0.2927915 0.2927915 0.2927915