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Journal Article THE GENERALIZATION OF ‘STUDENT'S’ PROBLEM WHEN SEVERAL DIFFERENT POPULATION VARLANCES ARE INVOLVED Get access B. L. WELCH, B.A., PH.D. B. L. WELCH, B.A., PH.D. Search for other works by this author on: Oxford Academic Google Scholar Biometrika, Volume 34, Issue 1-2, January 1947, Pages 28–35, https://doi.org/10.1093/biomet/34.1-2.28 Published: 01 January 1947
B. L. Welch (Wed,) studied this question.