condition mean min max ZT0-3 0.04191275 0.0 0.0838255 ZT4-7 0.0825005 0.0825005 0.0825005 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0