condition mean min max ZT0-3 0.08037525 0.0527205 0.10803 ZT4-7 0.0 0.0 0.0 ZT8-11 0.053392 0.053392 0.053392 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0