condition mean min max ZT0-3 0.013464625 0.0 0.02692925 ZT4-7 0.02747585 0.02747585 0.02747585 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0265882 0.0265882 0.0265882 ZT20-23 0.02655765 0.02655765 0.02655765