condition mean min max ZT0-3 1422.5 1422.5 1422.5 ZT4-7 1402.9 1402.9 1402.9 ZT8-11 1577.15 1577.15 1577.15 ZT12-15 1557.35 1557.35 1557.35 ZT16-19 1429.75 1429.75 1429.75 ZT20-23 1437.05 1437.05 1437.05