condition mean min max ZT0-3 37.847632 37.847632 37.847632 ZT4-7 40.508881 40.508881 40.508881 ZT8-11 41.578669500000004 41.578669500000004 41.578669500000004 ZT12-15 43.8220155 43.8220155 43.8220155 ZT16-19 48.409412 48.409412 48.409412 ZT20-23 45.605024 45.605024 45.605024