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  1. Accumulo
  2. ACCUMULO-2494

Stat calculation of STDEV may be inaccurate

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.5.2, 1.6.0
    • Component/s: client
    • Labels:
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      Description

      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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              • Assignee:
                mdrob Mike Drob
                Reporter:
                mdrob Mike Drob
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                • Created:
                  Updated:
                  Resolved: