condition mean min max ZT0-3 1441.9 1441.9 1441.9 ZT4-7 1279.8 1279.8 1279.8 ZT8-11 1381.45 1381.45 1381.45 ZT12-15 1492.5500000000002 1492.5500000000002 1492.5500000000002 ZT16-19 1431.5500000000002 1431.5500000000002 1431.5500000000002 ZT20-23 1398.7 1398.7 1398.7