condition mean min max ZT0-3 0.0090686 0.0090686 0.0090686 ZT4-7 0.10067855 0.10067855 0.10067855 ZT8-11 0.02392135 0.02392135 0.02392135 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0219899 0.0219899 0.0219899 ZT20-23 0.0327256 0.0327256 0.0327256