condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0097923735 0.0 0.019584747 ZT12-15 0.06303001175 0.027273363999999998 0.09878665950000001 ZT16-19 0.011790265500000001 0.0 0.023580531000000002 ZT20-23 0.05062896025 0.0373142095 0.063943711