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https://issues.apache.org/jira/browse/MATH-1373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15321625#comment-15321625
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Gilles commented on MATH-1373:
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Since there are many tests for this class, I wonder what the problem is.
Is it a documentation bug?
Would you provide a patch that would fix the issue?
> In LogNormalDistribution.java, it appears shape & scale are
> reversed/mis-labelled.
> ----------------------------------------------------------------------------------
>
> Key: MATH-1373
> URL: https://issues.apache.org/jira/browse/MATH-1373
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.6.1
> Reporter: Karl D. Gierach
> Priority: Minor
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> When I compute the logshape and log scale based on the formulas on
> wikipedia's lognormal distribution page that use empirical mean and variance,
> I found that the getNumericalMean() method was not returning the empirical
> mean.
> However, upon just trying to reverse the shape and scale parameters in the
> constructor proved to fix the problem, and the object then returns the
> correct empirical mean.
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