condition mean min max ZT0-3 1681.55 1681.55 1681.55 ZT4-7 2845.5 2845.5 2845.5 ZT8-11 2974.0 2974.0 2974.0 ZT12-15 3182.8500000000004 3182.8500000000004 3182.8500000000004 ZT16-19 2941.1000000000004 2941.1000000000004 2941.1000000000004 ZT20-23 3240.4 3240.4 3240.4