condition mean min max ZT0-3 1.3155833333333333 0.0 3.94675 ZT4-7 3.59371 3.59371 3.59371 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0