condition mean min max ZT0-3 32.25 32.25 32.25 ZT4-7 25.3 25.3 25.3 ZT8-11 28.099999999999998 28.099999999999998 28.099999999999998 ZT12-15 30.65 30.65 30.65 ZT16-19 36.55 36.55 36.55 ZT20-23 27.35 27.35 27.35