condition mean min max ZT0-3 42.25 42.25 42.25 ZT4-7 19.8 19.8 19.8 ZT8-11 28.75 28.75 28.75 ZT12-15 42.15 42.15 42.15 ZT16-19 29.6 29.6 29.6 ZT20-23 27.5 27.5 27.5