condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0549625 0.0549625 0.0549625 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.109932 0.109932 0.109932 ZT20-23 0.0553655 0.0553655 0.0553655