condition mean min max ZT0-3 25.95 25.95 25.95 ZT4-7 26.0 26.0 26.0 ZT8-11 19.35 19.35 19.35 ZT12-15 36.2 36.2 36.2 ZT16-19 30.95 30.95 30.95 ZT20-23 45.0 45.0 45.0