condition mean min max ZT0-3 29.4 29.4 29.4 ZT4-7 27.4 27.4 27.4 ZT8-11 22.25 22.25 22.25 ZT12-15 23.35 23.35 23.35 ZT16-19 37.15 37.15 37.15 ZT20-23 31.0 31.0 31.0