condition mean min max ZT0-3 749.3 749.3 749.3 ZT4-7 595.4 595.4 595.4 ZT8-11 657.9000000000001 657.9000000000001 657.9000000000001 ZT12-15 844.45 844.45 844.45 ZT16-19 850.5999999999999 850.5999999999999 850.5999999999999 ZT20-23 672.25 672.25 672.25