condition mean min max ZT0-3 0.31277049999999995 0.31277049999999995 0.31277049999999995 ZT4-7 0.14628449999999998 0.14628449999999998 0.14628449999999998 ZT8-11 0.419556 0.419556 0.419556 ZT12-15 3.812915 3.812915 3.812915 ZT16-19 1.9907650000000001 1.9907650000000001 1.9907650000000001 ZT20-23 0.3803555 0.3803555 0.3803555