condition mean min max ZT0-3 1621.8000000000002 1621.8000000000002 1621.8000000000002 ZT4-7 1578.3 1578.3 1578.3 ZT8-11 1345.5 1345.5 1345.5 ZT12-15 1000.85 1000.85 1000.85 ZT16-19 1126.8 1126.8 1126.8 ZT20-23 1429.9 1429.9 1429.9