condition mean min max ZT0-3 27.1 27.1 27.1 ZT4-7 33.0 33.0 33.0 ZT8-11 29.45 29.45 29.45 ZT12-15 42.45 42.45 42.45 ZT16-19 28.9 28.9 28.9 ZT20-23 51.8 51.8 51.8