Monday, January 29, 2007

The first ever regression

Q: Who introduced the term 'regression' ?

A: Francis Galton. In his famous paper, "Family Likeness in Stature", Proceedings of Royal Society, London - 1886, he found that although there was a tendency for tall parents to have tall children and short parents to have short children, the average height of children born of parents of a given height tended to move or "regress" toward the average height in the population as a whole. This was Galton's law of universal regression. This law was then confirmed by Galton's friend Karl Pearson, who collected more than a 1000 records of heights of members of family groups.

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