condition mean min max ZT0-3 209.85 209.85 209.85 ZT4-7 702.4 702.4 702.4 ZT8-11 940.5 940.5 940.5 ZT12-15 1247.05 1247.05 1247.05 ZT16-19 821.3 821.3 821.3 ZT20-23 363.54999999999995 363.54999999999995 363.54999999999995