condition mean min max ZT0-3 14.45 14.45 14.45 ZT4-7 19.1 19.1 19.1 ZT8-11 42.8 42.8 42.8 ZT12-15 50.75 50.75 50.75 ZT16-19 29.4 29.4 29.4 ZT20-23 33.599999999999994 33.599999999999994 33.599999999999994