condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.260458 0.260458 0.260458 ZT8-11 0.0 0.0 0.0 ZT12-15 0.065976 0.0 0.131952 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0