condition mean min max ZT0-3 0.530722 0.44311900000000004 0.618325 ZT4-7 0.4438025 0.4438025 0.4438025 ZT8-11 0.8532285 0.8532285 0.8532285 ZT12-15 0 0 0 ZT16-19 1.5974599999999999 1.5974599999999999 1.5974599999999999 ZT20-23 1.0204645 1.0204645 1.0204645