condition mean min max ZT0-3 28.323800000000002 28.323800000000002 28.323800000000002 ZT4-7 25.56105 25.56105 25.56105 ZT8-11 25.6884 25.6884 25.6884 ZT12-15 38.77375000000001 38.77375000000001 38.77375000000001 ZT16-19 49.5484 49.5484 49.5484 ZT20-23 47.47323333333333 47.47323333333333 47.47323333333333