condition mean min max ZT0-3 11.7727675125 11.76651202 11.779023004999999 ZT4-7 11.38682004775 10.6639605405 12.109679555 ZT8-11 12.6349616925 11.69425514 13.575668245 ZT12-15 7.42650054125 5.8241836625 9.02881742 ZT16-19 6.739891983250001 5.931771842 7.548012124500001 ZT20-23 8.947732614749999 8.3904993775 9.504965852