condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0333208 0.0333208 0.0333208 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0643618 0.0643618 0.0643618 ZT20-23 0.0 0.0 0.0