condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.011178830166666666 0.0 0.02235766033333333 ZT8-11 0.01421948 0.0 0.02843896 ZT12-15 0.0 0.0 0.0 ZT16-19 0.013204691166666666 0.0 0.026409382333333332 ZT20-23 0.012437254000000002 0.0 0.024874508000000004