condition mean min max ZT0-3 1272.6 1272.6 1272.6 ZT4-7 2117.0 2117.0 2117.0 ZT8-11 2037.8 2037.8 2037.8 ZT12-15 2009.8 2009.8 2009.8 ZT16-19 1837.05 1837.05 1837.05 ZT20-23 1343.5 1343.5 1343.5