condition mean min max ZT0-3 2853.55 2853.55 2853.55 ZT4-7 1827.0 1827.0 1827.0 ZT8-11 1554.4 1554.4 1554.4 ZT12-15 1566.35 1566.35 1566.35 ZT16-19 2114.25 2114.25 2114.25 ZT20-23 2576.8 2576.8 2576.8