condition mean min max ZT0-3 0.17232025 0.1701535 0.174487 ZT4-7 0.881618 0.881618 0.881618 ZT8-11 2.0778065000000003 2.0778065000000003 2.0778065000000003 ZT12-15 0 0 0 ZT16-19 1.37121 1.37121 1.37121 ZT20-23 0.5175175 0.5175175 0.5175175