condition mean min max ZT0-3 0.5626241666666666 0.143196 1.395625 ZT4-7 0.1368735 0.1368735 0.1368735 ZT8-11 0.33574800000000005 0.33574800000000005 0.33574800000000005 ZT12-15 0.30080324999999997 0.095837 0.5057695 ZT16-19 0.18401795 0.18401795 0.18401795 ZT20-23 0.409486 0.409486 0.409486