condition mean min max ZT0-3 1.36653 1.33407 1.39899 ZT4-7 0.316725 0.316725 0.316725 ZT8-11 0.1954843 0.1954843 0.1954843 ZT12-15 0 0 0 ZT16-19 0.675948 0.675948 0.675948 ZT20-23 0.6072255 0.6072255 0.6072255