condition mean min max ZT0-3 1848.6 1848.6 1848.6 ZT4-7 2565.7 2565.7 2565.7 ZT8-11 2876.1499999999996 2876.1499999999996 2876.1499999999996 ZT12-15 2753.0 2753.0 2753.0 ZT16-19 2445.0 2445.0 2445.0 ZT20-23 2127.45 2127.45 2127.45