condition mean min max ZT0-3 41.25 41.25 41.25 ZT4-7 5.2 5.2 5.2 ZT8-11 37.0 37.0 37.0 ZT12-15 36.5 36.5 36.5 ZT16-19 12.2 12.2 12.2 ZT20-23 47.849999999999994 47.849999999999994 47.849999999999994