condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.12022779625 0.0 0.2404555925 ZT16-19 0.39246296125 0.319537159 0.4653887635 ZT20-23 0.09928284675 0.0 0.1985656935