condition mean min max ZT0-3 27.35 27.35 27.35 ZT4-7 29.6 29.6 29.6 ZT8-11 14.8 14.8 14.8 ZT12-15 22.1 22.1 22.1 ZT16-19 49.25 49.25 49.25 ZT20-23 15.25 15.25 15.25