condition mean min max ZT0-3 0.468687 0.468687 0.468687 ZT4-7 0.0 0.0 0.0 ZT8-11 1.040906 1.040906 1.040906 ZT12-15 0.0 0.0 0.0 ZT16-19 0.481863 0.481863 0.481863 ZT20-23 0.0 0.0 0.0