condition mean min max ZT0-3 49.32125 49.32125 49.32125 ZT4-7 26.8759 26.8759 26.8759 ZT8-11 46.87485 46.87485 46.87485 ZT12-15 51.432599999999994 51.432599999999994 51.432599999999994 ZT16-19 51.5714 51.5714 51.5714 ZT20-23 56.84035 56.84035 56.84035