condition mean min max ZT0-3 2829.4 2829.4 2829.4 ZT4-7 1908.8 1908.8 1908.8 ZT8-11 2008.3000000000002 2008.3000000000002 2008.3000000000002 ZT12-15 1890.4 1890.4 1890.4 ZT16-19 2307.4 2307.4 2307.4 ZT20-23 2535.75 2535.75 2535.75