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Journal Article ON GENERALISED TCHEBYCHEFF THEOREMS IN THE MATHEMATICAL THEORY OF STATISTICS Get access KARL PEARSON, F.R.S. KARL PEARSON, F.R.S. Search for other works by this author on: Oxford Academic Google Scholar Biometrika, Volume 12, Issue 3-4, November 1919, Pages 284–296, https://doi.org/10.1093/biomet/12.3-4.284 Published: 01 November 1919
Karl Pearson (Wed,) studied this question.