condition mean min max ZT0-3 0.047017 0.0 0.094034 ZT4-7 0.092837 0.092837 0.092837 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.092843 0.092843 0.092843 ZT20-23 0.0 0.0 0.0