condition mean min max ZT0-3 1555.85 1555.85 1555.85 ZT4-7 1589.8 1589.8 1589.8 ZT8-11 1290.5500000000002 1290.5500000000002 1290.5500000000002 ZT12-15 1331.65 1331.65 1331.65 ZT16-19 1494.35 1494.35 1494.35 ZT20-23 1481.95 1481.95 1481.95