condition mean min max ZT0-3 1926.838497 1926.838497 1926.838497 ZT4-7 1586.641724 1586.641724 1586.641724 ZT8-11 1313.5782105 1313.5782105 1313.5782105 ZT12-15 1702.0732695000002 1702.0732695000002 1702.0732695000002 ZT16-19 1442.8985335 1442.8985335 1442.8985335 ZT20-23 1241.4135535 1241.4135535 1241.4135535