condition mean min max ZT0-3 1564.45 1564.45 1564.45 ZT4-7 1940.0 1940.0 1940.0 ZT8-11 1571.9 1571.9 1571.9 ZT12-15 1519.3000000000002 1519.3000000000002 1519.3000000000002 ZT16-19 1443.05 1443.05 1443.05 ZT20-23 1311.9499999999998 1311.9499999999998 1311.9499999999998