condition mean min max ZT0-3 1626.8000000000002 1626.8000000000002 1626.8000000000002 ZT4-7 1464.3 1464.3 1464.3 ZT8-11 1512.4 1512.4 1512.4 ZT12-15 1339.75 1339.75 1339.75 ZT16-19 1425.4 1425.4 1425.4 ZT20-23 1504.95 1504.95 1504.95