condition mean min max ZT0-3 0.021469475000000002 0.02145505 0.0214839 ZT4-7 0.0 0.0 0.0 ZT8-11 0.2605885 0.2605885 0.2605885 ZT12-15 0 0 0 ZT16-19 0.0423666 0.0423666 0.0423666 ZT20-23 0.0213373 0.0213373 0.0213373