condition mean min max ZT0-3 0.09901225 0.0323375 0.165687 ZT4-7 0.03263675 0.03263675 0.03263675 ZT8-11 0.03369585 0.03369585 0.03369585 ZT12-15 0 0 0 ZT16-19 0.13029849999999998 0.13029849999999998 0.13029849999999998 ZT20-23 0.0 0.0 0.0