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ON THE MEANS OF SAMPLES FROM A U-SHAPED POPULATION Get access K. J. HOLZINGER, PH.D., K. J. HOLZINGER, PH.D. Search for other works by this author on: Oxford Academic Google Scholar A. E. R. CHURCH, M.A., D.Sc. A. E. R. CHURCH, M.A., D.Sc. Search for other works by this author on: Oxford Academic Google Scholar Biometrika, Volume 20A, Issue 3-4, December 1928, Pages 361–388, https://doi.org/10.1093/biomet/20A.3-4.361 Published: 01 December 1928
Holzinger et al. (Sun,) studied this question.