FIG. 18.7 Galton’s data showing distribution of height of offspring of (a) the tallest parents and (b) the shortest parents. Data from F. Galton, 1888, “Co-Relations and Their Measurement, Chiefly from Anthropometric Data,” Proceedings of the Royal Society, London 45:135–145, reprinted in K. Pearson, 1920, “Notes on the History of Correlation,” Biometrika 13:25–45.

Data from F. Galton, 1888, “Co-Relations and Their Measurement, Chiefly from Anthropometric Data,” Proceedings of the Royal Society, London 45:135–145, reprinted in K. Pearson, 1920, “Notes on the History of Correlation,” Biometrika 13:25–45.