condition mean min max ZT0-3 0.210816 0.06826135 0.40107400000000004 ZT4-7 0.0967901 0.0967901 0.0967901 ZT8-11 0.0331826 0.0331826 0.0331826 ZT12-15 0.68666825 0.6515905 0.721746 ZT16-19 0.657864 0.657864 0.657864 ZT20-23 0.6350585 0.6350585 0.6350585