condition mean min max ZT0-3 1303.5500000000002 1303.5500000000002 1303.5500000000002 ZT4-7 1486.2 1486.2 1486.2 ZT8-11 1322.25 1322.25 1322.25 ZT12-15 1217.85 1217.85 1217.85 ZT16-19 1343.35 1343.35 1343.35 ZT20-23 1549.65 1549.65 1549.65