condition mean min max ZT0-3 1.0023715 1.0023715 1.0023715 ZT4-7 0.3389945 0.3389945 0.3389945 ZT8-11 0.704803 0.704803 0.704803 ZT12-15 0.2608005 0.2608005 0.2608005 ZT16-19 0.5935625 0.5935625 0.5935625 ZT20-23 0.292882 0.292882 0.292882