condition mean min max ZT0-3 1837.8 1837.8 1837.8 ZT4-7 1210.1 1210.1 1210.1 ZT8-11 1884.9 1884.9 1884.9 ZT12-15 1812.4 1812.4 1812.4 ZT16-19 2036.0 2036.0 2036.0 ZT20-23 2051.65 2051.65 2051.65