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  1. Accumulo
  2. ACCUMULO-2494

Stat calculation of STDEV may be inaccurate

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • 1.5.2, 1.6.0
    • client
    • None

    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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          incorporates

          Sub-task - The sub-task of the issue ACCUMULO-2546 build fails against hadoop 2.3.0

          • Blocker - Blocks development and/or testing work, production could not run
          • Resolved
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              mdrob Mike Drob
              mdrob Mike Drob
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              Dates

                Created:
                Updated:
                Resolved: