condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0705635 0.0705635 0.0705635 ZT12-15 0 0 0 ZT16-19 0.070049 0.070049 0.070049 ZT20-23 0.070837 0.070837 0.070837