condition mean min max ZT0-3 1.40402125 0.5059875 2.302055 ZT4-7 0.305734 0.305734 0.305734 ZT8-11 0.10259650000000001 0.10259650000000001 0.10259650000000001 ZT12-15 0 0 0 ZT16-19 0.2011915 0.2011915 0.2011915 ZT20-23 0.303732 0.303732 0.303732