condition mean min max ZT0-3 0.019820325 0.01978935 0.0198513 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0390005 0.0390005 0.0390005 ZT20-23 0.01951625 0.01951625 0.01951625