condition mean min max ZT0-3 0.0451174 0.0451174 0.0451174 ZT4-7 0.0554293 0.0554293 0.0554293 ZT8-11 0.011249 0.011249 0.011249 ZT12-15 0.30058359999999995 0.30058359999999995 0.30058359999999995 ZT16-19 0.2183455 0.2183455 0.2183455 ZT20-23 0.11165775 0.11165775 0.11165775