condition mean min max ZT0-3 25.65 25.65 25.65 ZT4-7 37.8 37.8 37.8 ZT8-11 27.45 27.45 27.45 ZT12-15 26.75 26.75 26.75 ZT16-19 30.4 30.4 30.4 ZT20-23 27.7 27.7 27.7