Add sample param to Standard Deviation and Coefficient of Variation functions #8
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Boolean param sample in
variance()
makes it possible to choose between Sample or Population. Althoughstandard_deviation()
andcoefficient_of_variation()
methods callsstandard_deviation()
to calculate the final result, neither of them passed this param. As sample is the default param invariance()
, there was no way to calculate Standard Deviation or Coefficient of Variation for a population dataset.Changes made in this pull request adds sample param to both. (with default value set to
True
)