condition mean min max ZT0-3 0.08520125 0.085144 0.0852585 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0840655 0.0840655 0.0840655 ZT20-23 0.0846765 0.0846765 0.0846765