condition mean min max ZT0-3 0.0734805 0.0734805 0.0734805 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.20239 0.20239 0.20239 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0