condition mean min max ZT0-3 1838.85 1838.85 1838.85 ZT4-7 1625.5 1625.5 1625.5 ZT8-11 1695.6 1695.6 1695.6 ZT12-15 1556.65 1556.65 1556.65 ZT16-19 1683.6 1683.6 1683.6 ZT20-23 1777.9 1777.9 1777.9