condition mean min max ZT0-3 3.18179514975 1.152489302 5.2111009975 ZT4-7 10.75853769525 8.8630116255 12.654063765 ZT8-11 6.285856439 4.693250910500001 7.8784619675 ZT12-15 0.8447461205 0.24497572699999998 1.444516514 ZT16-19 0.52098261125 0.4657279645 0.576237258 ZT20-23 0.49467963724999997 0.46229689549999997 0.527062379