condition mean min max ZT0-3 0.031751 0.0 0.095253 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.25703149999999997 0.167175 0.346888 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0