condition mean min max ZT0-3 0.191043 0.085321 0.296765 ZT4-7 0.0 0.0 0.0 ZT8-11 0.04213085 0.04213085 0.04213085 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.12617495 0.12617495 0.12617495