condition mean min max ZT0-3 37.40501144075 7.9897717915 66.82025109 ZT4-7 2.6597138879999997 1.7176863770000002 3.601741399 ZT8-11 9.837436615000001 7.606846295 12.068026935 ZT12-15 16.20873955975 15.997148945 16.420330174500002 ZT16-19 10.0300886285 9.577515440500001 10.4826618165 ZT20-23 16.42235133 14.782907895 18.061794765000002