Answer to Question #138983 in Statistics and Probability for Jeanina Muñoz

Question #138983
Why the standard deviation is the better measure of variability?
Expert's answer
  • It takes into account all values in a series and does not ignore any item, unlike in quartiles, percentiles, range, median, etc
  • It follows the algebraic principles and does not ignore negative values, unlike the mean deviation
  • It can be used for higher statistical analysis like skewness and regression
  • It enables us to determine the reliability of means of two or more series, when they exhibit similar means
  • It is unambiguous, since it is rigidly defined
  • It is not greatly affected by flactuations
  • It is possible to calculate combined standard deviation of two groups. This is not possible with any other measure of variability

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