Talk:Exponentially modified Gaussian distribution

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The PDF for the exGaussian with parameters (mu=-3, sigma=1, nu=0.25; orange line) is wrong. Checked against R and matlab (e.g.

Error in Kurtosis excess[edit]

Using Mathematica 9.0, I find the Kurtosis excess to be \frac{\frac{9}{\lambda ^4}+\frac{6 \sigma ^2}{\lambda ^2}+3 \sigma
   ^4}{\left(\frac{1}{\lambda ^2}+\sigma ^2\right)^2}-3 (i.e., the factored constant at the front of the numerator is "2" in the article, but should be "3"). This alternative expression simplifies to \frac{6}{\left(\lambda ^2 \sigma ^2+1\right)^2}. Sadly, this is "original research". -- (talk) 22:38, 22 July 2014 (UTC)

In several numerical examples with the fourth moment computed by numerical integration in MATLAB, I also found that the factored constant at the front of the numerator should be "3" rather than "2". — Preceding unsigned comment added by (talk) 20:20, 1 January 2015 (UTC)