condition mean min max ZT0-3 36.75 36.75 36.75 ZT4-7 73.4 73.4 73.4 ZT8-11 62.5 62.5 62.5 ZT12-15 49.05 49.05 49.05 ZT16-19 45.05 45.05 45.05 ZT20-23 46.849999999999994 46.849999999999994 46.849999999999994