condition mean min max ZT0-3 2537.3 2537.3 2537.3 ZT4-7 2375.5 2375.5 2375.5 ZT8-11 2218.0 2218.0 2218.0 ZT12-15 1896.25 1896.25 1896.25 ZT16-19 2627.1 2627.1 2627.1 ZT20-23 2887.1499999999996 2887.1499999999996 2887.1499999999996