condition mean min max ZT0-3 73.55 73.55 73.55 ZT4-7 7.3 7.3 7.3 ZT8-11 35.65 35.65 35.65 ZT12-15 54.599999999999994 54.599999999999994 54.599999999999994 ZT16-19 70.75 70.75 70.75 ZT20-23 56.5 56.5 56.5