condition mean min max ZT0-3 0.4151252845 0.237577829 0.59267274 ZT4-7 1.013704468 0.6829113900000001 1.344497546 ZT8-11 2.1925586790000002 1.6577810140000002 2.7273363440000002 ZT12-15 4.439629148250001 4.0347219105 4.844536386000001 ZT16-19 1.5357031879999998 1.262794786 1.80861159 ZT20-23 1.1526499719999999 1.0217855445 1.2835143995