condition mean min max ZT0-3 27.45 27.45 27.45 ZT4-7 22.6 22.6 22.6 ZT8-11 26.6 26.6 26.6 ZT12-15 15.95 15.95 15.95 ZT16-19 29.95 29.95 29.95 ZT20-23 33.75 33.75 33.75