condition mean min max ZT0-3 2853.6000000000004 2853.6000000000004 2853.6000000000004 ZT4-7 5161.5 5161.5 5161.5 ZT8-11 4822.45 4822.45 4822.45 ZT12-15 3514.6000000000004 3514.6000000000004 3514.6000000000004 ZT16-19 2918.3 2918.3 2918.3 ZT20-23 2761.0 2761.0 2761.0