condition mean min max ZT0-3 505.70000000000005 505.70000000000005 505.70000000000005 ZT4-7 478.0 478.0 478.0 ZT8-11 472.8 472.8 472.8 ZT12-15 540.3 540.3 540.3 ZT16-19 733.45 733.45 733.45 ZT20-23 648.6500000000001 648.6500000000001 648.6500000000001