condition mean min max ZT0-3 26.45 26.45 26.45 ZT4-7 56.9 56.9 56.9 ZT8-11 55.85 55.85 55.85 ZT12-15 50.2 50.2 50.2 ZT16-19 43.3 43.3 43.3 ZT20-23 33.85 33.85 33.85