condition mean min max ZT0-3 183.3 183.3 183.3 ZT4-7 165.4 165.4 165.4 ZT8-11 151.25 151.25 151.25 ZT12-15 179.35 179.35 179.35 ZT16-19 223.9 223.9 223.9 ZT20-23 182.4 182.4 182.4