Journal Article METHODS OF STATISTICAL ANALYSIS APPROPRIATE FOR k SAMPLES OF TWO VARIABLES Get access E. S. PEARSON, D.Sc., E. S. PEARSON, D.Sc. Search for other works by this author on: Oxford Academic Google Scholar S. S. WILKS, PH.D. S. S. WILKS, PH.D. Search for other works by this author on: Oxford Academic Google Scholar Biometrika, Volume 25, Issue 3-4, December 1933, Pages 353–378, https://doi.org/10.1093/biomet/25.3-4.353 Published: 01 December 1933
Pearson et al. (Fri,) studied this question.