condition mean min max ZT0-3 0.1112309 0.1112309 0.1112309 ZT4-7 0.0103825 0.0103825 0.0103825 ZT8-11 0.0139903 0.0139903 0.0139903 ZT12-15 0.0 0.0 0.0 ZT16-19 0.008351599999999999 0.008351599999999999 0.008351599999999999 ZT20-23 0.0331756 0.0331756 0.0331756