condition mean min max ZT0-3 0.96888525 0.924431 1.0133395 ZT4-7 0.6130504999999999 0.6130504999999999 0.6130504999999999 ZT8-11 1.3681299999999998 1.3681299999999998 1.3681299999999998 ZT12-15 0 0 0 ZT16-19 1.494615 1.494615 1.494615 ZT20-23 1.58237 1.58237 1.58237