condition mean min max ZT0-3 0.17428475 0.1529995 0.19557 ZT4-7 0.423556 0.423556 0.423556 ZT8-11 0.909148 0.909148 0.909148 ZT12-15 1.3616208333333333 1.1741786666666667 1.549063 ZT16-19 0.338667 0.330729 0.346605 ZT20-23 0 0 0