condition mean min max ZT0-3 1814.55 1814.55 1814.55 ZT4-7 1940.0 1940.0 1940.0 ZT8-11 2052.2 2052.2 2052.2 ZT12-15 2108.35 2108.35 2108.35 ZT16-19 1883.4 1883.4 1883.4 ZT20-23 1672.05 1672.05 1672.05