condition mean min max ZT0-3 0.756043804 0.0 1.512087608 ZT4-7 1.4867303575 1.176302813 1.797157902 ZT8-11 2.344117259 2.012009952 2.676224566 ZT12-15 2.65544390375 2.467456319 2.8434314885000003 ZT16-19 5.766163955250001 4.3752150925 7.157112818 ZT20-23 7.4996058130000005 6.826922078500001 8.1722895475