condition mean min max ZT0-3 1.42469225 1.2642745 1.58511 ZT4-7 1.33008 1.33008 1.33008 ZT8-11 0.636182 0.636182 0.636182 ZT12-15 0 0 0 ZT16-19 0.9035755 0.9035755 0.9035755 ZT20-23 1.58866 1.58866 1.58866