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Ever since the introduction of the correlation coefficient in 1888, there has been some confusion between zero correlation and statistical independence. We examine this, with emphasis on Student’s famous 1908 paper leading to the t-test, and indicate some subsequent developments.

A Historical Note on Zero Correlation and Independence’, HerbertA.DavidThe American Statistician, 63 (2) (2009): 185–186. Copyright 2009. Reproduced with permission of Taylor & Francis Informa UK Ltd - Journals in the format Textbook via Copyright Clearance Center.
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