condition mean min max ZT0-3 0.5047659999999999 0.0 1.179425 ZT4-7 0.6442185 0.6442185 0.6442185 ZT8-11 1.1548105 1.1548105 1.1548105 ZT12-15 1.5610585000000001 0.880637 2.24148 ZT16-19 1.7139699999999998 1.7139699999999998 1.7139699999999998 ZT20-23 1.586775 1.586775 1.586775