A Graphic Solution of Multiple and Partial Correlation Coefficients for Three Variable Problems 1

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2 Davidoff M. D. “A Graphic Solution of Multiple and Partial Correlation Coefficients for Three Variable Problems.” Unpublished Master's thesis, Purdue University, 1941.

3 Guilford J. P. Psychometric Methods. New York: McGraw-Hill Book Co., 1936.

4 Jackson Dunham . “The Trigonometry of Correlation.” American Mathematical Monthly, XXXI (1924), 275–230.