K. Pearson to F. Galton, 8th Dec 1894.- External URL
- Correspondence Details
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Sent From (Definite): Karl PearsonSent To (Definite): Sir Francis GaltonDate: 8 Dec 1894
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Holder (Definite): University College London: Special Collections
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Sent fromKarl Pearson
8 Dec 1894
Description:
‘Dear Mr Galton,
...
One other point, not as to my paper, but bearing on a fact pointed out by you. In dealing with a considerable number of skull measurements of various kinds, 1st for males & then for females, I have found with a great degree of exactness, that the ratio of the means is equal to the ratio of the probable deviations. In other words, that reduced to the same scale, women varies to the same extent as man. Within my close limits the ratio is practically 13 to 12, as already stated by you, and in one case where we did not find it come out near this ratio, the divergence led to reexamination of our arithmetic and the discovery of an error of calculation!
The difficulty is to get time enough from one’s ordinary teaching work to follow up all these exciting statistical points, and younger heads to help in the calculations.
Yours truly,
Karl Pearson.’
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Sent toSir Francis Galton
8 Dec 1894
Description:
‘Dear Mr Galton,
...
One other point, not as to my paper, but bearing on a fact pointed out by you. In dealing with a considerable number of skull measurements of various kinds, 1st for males & then for females, I have found with a great degree of exactness, that the ratio of the means is equal to the ratio of the probable deviations. In other words, that reduced to the same scale, women varies to the same extent as man. Within my close limits the ratio is practically 13 to 12, as already stated by you, and in one case where we did not find it come out near this ratio, the divergence led to reexamination of our arithmetic and the discovery of an error of calculation!
The difficulty is to get time enough from one’s ordinary teaching work to follow up all these exciting statistical points, and younger heads to help in the calculations.
Yours truly,
Karl Pearson.’
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