Source: Table 5.1. Four psychological test scores on 32 males and 32 females, page 125 of Rencher, A. C. 2002. Methods of Multivariate Analysis. 2nd ed. New York: Wiley.
Rencher (2002) cites. Beall, G. 1945. Approximate methods in calculating discriminant functions. Psychometrika 10: 205-217. https://doi.org/10.1007/BF02310469.