condition mean min max ZT0-3 1981.9 1981.9 1981.9 ZT4-7 1810.5 1810.5 1810.5 ZT8-11 1743.75 1743.75 1743.75 ZT12-15 1649.25 1649.25 1649.25 ZT16-19 1932.25 1932.25 1932.25 ZT20-23 2061.4 2061.4 2061.4