condition mean min max ZT0-3 1492.3 1492.3 1492.3 ZT4-7 1991.8 1991.8 1991.8 ZT8-11 1892.1499999999999 1892.1499999999999 1892.1499999999999 ZT12-15 2107.9 2107.9 2107.9 ZT16-19 2564.7 2564.7 2564.7 ZT20-23 1852.5 1852.5 1852.5