condition mean min max ZT0-3 0.0478501 0.0 0.0957002 ZT4-7 0.051302099999999996 0.051302099999999996 0.051302099999999996 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0503095 0.0 0.100619 ZT16-19 0.0 0.0 0.0 ZT20-23 0.245798 0.245798 0.245798