condition mean min max ZT0-3 1775.9 1775.9 1775.9 ZT4-7 1769.0 1769.0 1769.0 ZT8-11 1747.35 1747.35 1747.35 ZT12-15 1691.1999999999998 1691.1999999999998 1691.1999999999998 ZT16-19 1871.1999999999998 1871.1999999999998 1871.1999999999998 ZT20-23 2172.85 2172.85 2172.85