condition mean min max ZT0-3 28.4 28.4 28.4 ZT4-7 24.1 24.1 24.1 ZT8-11 38.0 38.0 38.0 ZT12-15 43.9 43.9 43.9 ZT16-19 28.5 28.5 28.5 ZT20-23 18.75 18.75 18.75