condition mean min max ZT0-3 2896.85 2896.85 2896.85 ZT4-7 2698.8 2698.8 2698.8 ZT8-11 2494.6000000000004 2494.6000000000004 2494.6000000000004 ZT12-15 2367.05 2367.05 2367.05 ZT16-19 2312.3 2312.3 2312.3 ZT20-23 2754.95 2754.95 2754.95