condition mean min max ZT0-3 89.25 89.25 89.25 ZT4-7 117.6 117.6 117.6 ZT8-11 131.4 131.4 131.4 ZT12-15 115.9 115.9 115.9 ZT16-19 81.85 81.85 81.85 ZT20-23 57.599999999999994 57.599999999999994 57.599999999999994