condition mean min max ZT0-3 0.31084999999999996 0.31084999999999996 0.31084999999999996 ZT4-7 0.0 0.0 0.0 ZT8-11 0.050072 0.050072 0.050072 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.318944 0.318944 0.318944