condition mean min max ZT0-3 0.6384575 0.4588945 0.8180205 ZT4-7 0.8789899999999999 0.8789899999999999 0.8789899999999999 ZT8-11 1.5153985 1.5153985 1.5153985 ZT12-15 0 0 0 ZT16-19 2.23979 2.23979 2.23979 ZT20-23 1.4469535 1.4469535 1.4469535