condition mean min max ZT0-3 2243.75 2243.75 2243.75 ZT4-7 2270.0 2270.0 2270.0 ZT8-11 2072.3 2072.3 2072.3 ZT12-15 1947.7 1947.7 1947.7 ZT16-19 1829.65 1829.65 1829.65 ZT20-23 2006.9 2006.9 2006.9