O paradoxo de Simpson é discutido aqui.
Boas referências são:
P.J. Bickel, E.A. Hammel e J.W. O'Connell. Sex Bias in Graduate Admissions: Data From Berkeley. Science v. 187, p. 398–404, 1975
C. R. Blyth. On Simpson's Paradox and the Sure-Thing Principle. Journal of the American Statistical Association v. 67, p. 364–366, 1972.
L. N. Dworsky Probably not. Wiley Interscience, 2008.
S. A. Julious, M. A. Mullee. Confounding and Simpson's paradox. BMJ v. 309, 1480–1481, 1994.
T. R. Knapp Instances of Simpson's paradox. The College Mathematics Journal, v. 16, p. 209-211, 1985.
C. H. Wagner. Simpson's Paradox in Real Life. The American Statistician v. 36, p. 46–48, 1982.
R. L. Wardrop. Simpson's Paradox and the Hot Hand in Basketball. The American Statistician v 49, p. 24–28, 1995.