condition mean min max ZT0-3 1308.0 1308.0 1308.0 ZT4-7 1377.5 1377.5 1377.5 ZT8-11 1440.1999999999998 1440.1999999999998 1440.1999999999998 ZT12-15 1322.45 1322.45 1322.45 ZT16-19 1451.95 1451.95 1451.95 ZT20-23 1527.85 1527.85 1527.85