condition mean min max ZT0-3 1771.0 1771.0 1771.0 ZT4-7 827.5 827.5 827.5 ZT8-11 1215.4 1215.4 1215.4 ZT12-15 1215.4 1215.4 1215.4 ZT16-19 1389.85 1389.85 1389.85 ZT20-23 1729.15 1729.15 1729.15