**Figure 2 : Histogram of logarithms of the relative risk, rate and ratio data, together with the mixture distribution y=0.192ϕ(x,0, 0.0789 ^{2} )+ 0.808ϕ(x,0.734, 0.686^{2}) where the numerical values used here are calculated as described in the sixth model.**

David Kault *Journal of Medical Statistics and Informatics* 2014 **2**:5DOI : 10.7243/2053-7662-2-5