condition mean min max ZT0-3 0.04048965 0.04048965 0.04048965 ZT4-7 0.0 0.0 0.0 ZT8-11 0.02086945 0.02086945 0.02086945 ZT12-15 0.042392650000000004 0.042392650000000004 0.042392650000000004 ZT16-19 0.01113895 0.01113895 0.01113895 ZT20-23 0.038975949999999995 0.038975949999999995 0.038975949999999995