condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.008853470833333333 0.0 0.017706941666666667 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0073378695 0.0 0.014675739 ZT20-23 0.0 0.0 0.0