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https://issues.apache.org/jira/browse/ACCUMULO-2494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13945389#comment-13945389
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ASF subversion and git services commented on ACCUMULO-2494:
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Commit 0dc92ca1288f521cbbeeb8bbd266fa922c845d90 in accumulo's branch
refs/heads/1.6.0-SNAPSHOT from [[email protected]]
[ https://git-wip-us.apache.org/repos/asf?p=accumulo.git;h=0dc92ca ]
ACCUMULO-2494 Delegate math to commons-math
> Stat calculation of STDEV may be inaccurate
> -------------------------------------------
>
> Key: ACCUMULO-2494
> URL: https://issues.apache.org/jira/browse/ACCUMULO-2494
> Project: Accumulo
> Issue Type: Bug
> Components: client
> Reporter: Mike Drob
>
> The math is sound, but it is susceptible to rounding errors. We should
> address that.
> See http://www.strchr.com/standard_deviation_in_one_pass and
> http://www.cs.berkeley.edu/~mhoemmen/cs194/Tutorials/variance.pdf
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