condition mean min max ZT0-3 34.05 34.05 34.05 ZT4-7 12.8 12.8 12.8 ZT8-11 33.25 33.25 33.25 ZT12-15 59.9 59.9 59.9 ZT16-19 27.6 27.6 27.6 ZT20-23 40.65 40.65 40.65