condition mean min max ZT0-3 0.15237900000000001 0.0 0.457137 ZT4-7 0.3345895 0.3345895 0.3345895 ZT8-11 0.5327995 0.5327995 0.5327995 ZT12-15 0.07905475 0.0 0.1581095 ZT16-19 0.1531905 0.1531905 0.1531905 ZT20-23 0.0 0.0 0.0