condition mean min max ZT0-3 2082.55 2082.55 2082.55 ZT4-7 1941.5 1941.5 1941.5 ZT8-11 1852.0 1852.0 1852.0 ZT12-15 1744.1999999999998 1744.1999999999998 1744.1999999999998 ZT16-19 1892.55 1892.55 1892.55 ZT20-23 2004.6 2004.6 2004.6