condition mean min max ZT0-3 647.65 647.65 647.65 ZT4-7 739.9 739.9 739.9 ZT8-11 557.3 557.3 557.3 ZT12-15 671.6500000000001 671.6500000000001 671.6500000000001 ZT16-19 705.65 705.65 705.65 ZT20-23 687.75 687.75 687.75