condition mean min max ZT0-3 1048.9 1048.9 1048.9 ZT4-7 1311.4 1311.4 1311.4 ZT8-11 1812.2 1812.2 1812.2 ZT12-15 2009.7 2009.7 2009.7 ZT16-19 1291.0 1291.0 1291.0 ZT20-23 945.1 945.1 945.1