condition mean min max ZT0-3 0.7883208065 0.7359958679999999 0.840645745 ZT4-7 1.6829502299999999 1.151919564 2.213980896 ZT8-11 2.302497756 2.063045726 2.541949786 ZT12-15 2.20144166425 1.9086760845000001 2.494207244 ZT16-19 3.10311925925 2.386447128 3.8197913905000003 ZT20-23 6.332946928 5.1369986445 7.5288952115