[jira] [Created] (ARROW-3122) [C++] Incremental Variance, Standard Deviation aggregators

[Wes McKinney (JIRA)]

Wes McKinney created ARROW-3122:
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             Summary: [C++] Incremental Variance, Standard Deviation aggregators
                 Key: ARROW-3122
                 URL: https://issues.apache.org/jira/browse/ARROW-3122
             Project: Apache Arrow
          Issue Type: New Feature
          Components: C++
            Reporter: Wes McKinney


These must provide for degrees of freedom adjustment when yielding result



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