The Distribution of the Sample Variance Under Normality

Comments on Helmert (1876b)
  • H. A. David
  • A. W. F. Edwards
Part of the Springer Series in Statistics book series (SSS)


The article translated here is actually just one part, with its own title, of a three-part paper that slays several dragons (Helmert, 1876b). Let X 1,..., X n be independent N(µ, σ 2) variates. In the omitted portions Helmert derives essentially the variance of the mean deviation and of the mean difference .


Flawed Investigation Posterior Mode Modern Reader Exact Variance Successive Linear 
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Copyright information

© Springer Science+Business Media New York 2001

Authors and Affiliations

  • H. A. David
    • 1
  • A. W. F. Edwards
    • 2
  1. 1.Statistical Laboratory and Department of StatisticsIowa State UniversityAmesUSA
  2. 2.Gonville and Caius CollegeCambridgeUK

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