condition mean min max ZT0-3 0.17888651666666666 0.08349899999999999 0.290161 ZT4-7 0.07987 0.07987 0.07987 ZT8-11 0.20264100000000002 0.20264100000000002 0.20264100000000002 ZT12-15 0.659808 0.6298429999999999 0.689773 ZT16-19 0.806144 0.806144 0.806144 ZT20-23 0.6994345 0.6994345 0.6994345