condition mean min max ZT0-3 747.6500000000001 747.6500000000001 747.6500000000001 ZT4-7 846.7 846.7 846.7 ZT8-11 790.25 790.25 790.25 ZT12-15 810.4000000000001 810.4000000000001 810.4000000000001 ZT16-19 876.75 876.75 876.75 ZT20-23 871.9000000000001 871.9000000000001 871.9000000000001