condition mean min max ZT0-3 0.8755367500000001 0.0 1.7510735000000002 ZT4-7 5.467882 5.467882 5.467882 ZT8-11 0.59045 0.59045 0.59045 ZT12-15 0 0 0 ZT16-19 0.814436 0.814436 0.814436 ZT20-23 1.362905 1.362905 1.362905