condition mean min max ZT0-3 1601.3 1601.3 1601.3 ZT4-7 1656.2 1656.2 1656.2 ZT8-11 1627.0 1627.0 1627.0 ZT12-15 1580.1 1580.1 1580.1 ZT16-19 1515.8 1515.8 1515.8 ZT20-23 1545.5500000000002 1545.5500000000002 1545.5500000000002