condition mean min max ZT0-3 0.13575274999999998 0.13444414999999998 0.13706135 ZT4-7 0.1675265 0.1675265 0.1675265 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.05420355 0.05420355 0.05420355