condition mean min max ZT0-3 0.0323875 0.0 0.0971625 ZT4-7 0.0924865 0.0924865 0.0924865 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.090794 0.090794 0.090794 ZT20-23 0.0 0.0 0.0