condition mean min max ZT0-3 63.599999999999994 63.599999999999994 63.599999999999994 ZT4-7 89.7 89.7 89.7 ZT8-11 86.55000000000001 86.55000000000001 86.55000000000001 ZT12-15 56.05 56.05 56.05 ZT16-19 63.25 63.25 63.25 ZT20-23 47.9 47.9 47.9