condition mean min max ZT0-3 0.89414049125 0.7176773040000001 1.0706036785 ZT4-7 1.0030180777500002 0.675725517 1.3303106385 ZT8-11 1.5890652964999998 1.4740322805 1.7040983124999998 ZT12-15 2.0403502807500002 1.609680736 2.4710198255 ZT16-19 1.42107384975 1.366367981 1.4757797185000001 ZT20-23 2.70532515725 2.1558156134999997 3.254834701