condition mean min max ZT0-3 1338.65 1338.65 1338.65 ZT4-7 1667.9 1667.9 1667.9 ZT8-11 1663.25 1663.25 1663.25 ZT12-15 1517.3000000000002 1517.3000000000002 1517.3000000000002 ZT16-19 1317.75 1317.75 1317.75 ZT20-23 1354.45 1354.45 1354.45