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  1. Commons Math
  2. MATH-1178

Incorrect sample of usage of StatUtils at homepage

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      At http://commons.apache.org/proper/commons-math/userguide/stat.html you are providing three ways to compute mean, std, median with DescriptiveStatistics, SummaryStatistics, StatUtils.
      But when you execute double std = StatUtils.variance(values), you are not actually get std in std, you get std*std, because DescriptiveStatistics actually returns FastMath.sqrt(getVariance()), but StatUtils returns variance directly.

      The solution is to substitute "double std = StatUtils.variance(values);" with "double std = FastMath.sqrt(StatUtils.variance(values));"

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              Reporter:
              zimy Dmitriy
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