condition mean min max ZT0-3 0.034272899999999995 0.034272899999999995 0.034272899999999995 ZT4-7 0.0227015 0.0227015 0.0227015 ZT8-11 0.15391895 0.15391895 0.15391895 ZT12-15 0.6817555 0.6817555 0.6817555 ZT16-19 1.2813750000000002 1.2813750000000002 1.2813750000000002 ZT20-23 0.265196 0.265196 0.265196