Source: Data from Rencher, A. C., and W. F. Christensen. 2012. Methods of Multivariate Analysis, 3rd ed. New York: Wiley. Table 6.2, rootstock data, 184.
Data originally from Andrews, D. F., and A. M. Herzberg. 1985. Data: A Collection of Problems from Many Fields for the Student and Research Worker (pp. 357-360). New York: Springer.