condition mean min max ZT0-3 54.604616 54.604616 54.604616 ZT4-7 66.44170399999999 66.44170399999999 66.44170399999999 ZT8-11 82.1890195 82.1890195 82.1890195 ZT12-15 70.011882 70.011882 70.011882 ZT16-19 76.874077 76.874077 76.874077 ZT20-23 58.054418999999996 58.054418999999996 58.054418999999996