condition mean min max ZT0-3 496.15000000000003 496.15000000000003 496.15000000000003 ZT4-7 614.9 614.9 614.9 ZT8-11 611.7 611.7 611.7 ZT12-15 574.6500000000001 574.6500000000001 574.6500000000001 ZT16-19 579.05 579.05 579.05 ZT20-23 440.0 440.0 440.0