condition mean min max ZT0-3 0.6191845 0.6191845 0.6191845 ZT4-7 0.4012075 0.4012075 0.4012075 ZT8-11 0.2179825 0.2179825 0.2179825 ZT12-15 0.373926 0.373926 0.373926 ZT16-19 1.1370655 1.1370655 1.1370655 ZT20-23 1.04843 1.04843 1.04843