condition mean min max ZT0-3 652.7 652.7 652.7 ZT4-7 1667.4 1667.4 1667.4 ZT8-11 1765.5 1765.5 1765.5 ZT12-15 2917.3 2917.3 2917.3 ZT16-19 2011.8 2011.8 2011.8 ZT20-23 837.3 837.3 837.3