I. Co-relations and their measurement, chiefly from anthropometric data

@article{GaltonICA,
  title={I. Co-relations and their measurement, chiefly from anthropometric data},
  author={Francis Sir Galton},
  journal={Proceedings of the Royal Society of London},
  volume={45},
  pages={135 - 145}
}
  • F. Galton
  • Geology
  • Proceedings of the Royal Society of London
“Co-relation or correlation of structure” is a phrase much used in biology, and not least in that branch of it which refers to heredity, and the idea is even more frequently present than the phrase; but I am not aware of any previous attempt to define it clearly, to trace its mode of action in detail, or to show how to measure its degree. Two variable organs are said to be co-related when the variation of the one is accompanied on the average by more or less variation of the other, and in the… 

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