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Journal Article ON THE PROBABLE ERROR OF THE BI-SERIAL EXPRESSION FOR THE CORRELATION COEFFICIENT Get access H. E. SOPER, M.A. H. E. SOPER, M.A. Biometric Laboratory, University of London Search for other works by this author on: Oxford Academic Google Scholar Biometrika, Volume 10, Issue 2-3, November 1914, Pages 384–390, https://doi.org/10.1093/biomet/10.2-3.384 Published: 01 November 1914
H. E. Soper (Thu,) studied this question.