Figure P14.2

Figure P14.2. Joint distribution of father’s height and mother’s height. The ellipses show regions of a bivariate normal distribution that contains 50%, 90%, and 99% of the distribution. (These data are from Pearson K. and Lee A. 1907. Biometrika 2: 357–462. Karl Pearson developed many of the methods used in quantitative genetics as part of his research in biometry [see p. 21].)