condition mean min max ZT0-3 1766.3 1766.3 1766.3 ZT4-7 1490.6 1490.6 1490.6 ZT8-11 1372.4 1372.4 1372.4 ZT12-15 1439.9499999999998 1439.9499999999998 1439.9499999999998 ZT16-19 1491.9 1491.9 1491.9 ZT20-23 1565.0500000000002 1565.0500000000002 1565.0500000000002