condition mean min max ZT0-3 0.03244325 0.0 0.0648865 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0676125 0.0676125 0.0676125 ZT12-15 0 0 0 ZT16-19 0.0654915 0.0654915 0.0654915 ZT20-23 0.0 0.0 0.0