condition mean min max ZT0-3 1040.95 1040.95 1040.95 ZT4-7 1676.3 1676.3 1676.3 ZT8-11 1222.85 1222.85 1222.85 ZT12-15 1095.8000000000002 1095.8000000000002 1095.8000000000002 ZT16-19 848.05 848.05 848.05 ZT20-23 778.5 778.5 778.5