condition mean min max ZT0-3 1687.0 1687.0 1687.0 ZT4-7 1886.1 1886.1 1886.1 ZT8-11 1742.1 1742.1 1742.1 ZT12-15 2178.3 2178.3 2178.3 ZT16-19 1724.25 1724.25 1724.25 ZT20-23 1425.9 1425.9 1425.9