condition mean min max ZT0-3 32.8 32.8 32.8 ZT4-7 37.0 37.0 37.0 ZT8-11 42.7 42.7 42.7 ZT12-15 28.25 28.25 28.25 ZT16-19 22.2 22.2 22.2 ZT20-23 20.0 20.0 20.0