condition mean min max ZT0-3 19.15 19.15 19.15 ZT4-7 7.1 7.1 7.1 ZT8-11 34.95 34.95 34.95 ZT12-15 37.3 37.3 37.3 ZT16-19 42.9 42.9 42.9 ZT20-23 33.0 33.0 33.0