condition mean min max ZT0-3 431.55725574999997 399.2162811 463.8982304 ZT4-7 533.9780931 462.0805636 605.8756226 ZT8-11 548.3040904750001 489.04438725 607.5637937 ZT12-15 655.4589225499999 644.9751017 665.9427433999999 ZT16-19 485.58134242500006 380.15899765000006 591.0036872000001 ZT20-23 366.7069896 330.65890195 402.75507725