condition mean min max ZT0-3 0.5437995 0.5437995 0.5437995 ZT4-7 0.18965300000000002 0.18965300000000002 0.18965300000000002 ZT8-11 0.2425311 0.2425311 0.2425311 ZT12-15 0.2705695 0.2705695 0.2705695 ZT16-19 0.7499359999999999 0.7499359999999999 0.7499359999999999 ZT20-23 0.443481 0.443481 0.443481