condition mean min max ZT0-3 26.961316666666665 18.199849999999998 32.78685 ZT4-7 16.6966 16.6966 16.6966 ZT8-11 15.55855 15.55855 15.55855 ZT12-15 26.9677 24.32235 29.61305 ZT16-19 28.35435 28.35435 28.35435 ZT20-23 35.30135 35.30135 35.30135