An Introduction to the theory of statistics

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Monograph

Identifikator:: 1751730271

URN:: urn:nbn:de:zbw-retromon-127610

Document type:: Monograph

Author:: Yule, George Udny http://d-nb.info/gnd/12910504X

Title:: An Introduction to the theory of statistics

Edition:: 8. ed. rev

Place of publication:: London

Publisher:: Griffin

Year of publication:: 1927

Scope:: XV, 422 S; Ill., Diagr

Digitisation:: 2021

Collection:: Economics Books

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Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: Part I. The theory of atributes

Collection:: Economics Books

IV.—PARTIAL ASSOCIATION. “7 The following comparisons indicate the association between grandparents and parents, parents and children, and grand- parents and grandchildren, respectively :— Grandparents and Parents. Proportion of light-eyed amongst hed _(BO)_2231 _ : t children of light-eyed grand parents (Cc) 3178 70:2 percent, Proportion of light-eyed amongst the B 8921 children of not-light-eyed A *» 7) parents . . . Parents and Children. Proportion of light-eyed amongst the | _ (45) _2524 _ children of light-eyed parents «JT (BY 3052 327 percent Proportion of light-eyed amongst the _(48) _ 1060 _ 542 children of not-light-eyed parents. (B) 1956 In both the above cases we are really dealing with the association between parent and offspring, and consequently the intensity of association is, as might be expected, approximately the same ; in the next case it is naturally lower: — Grandparents and Grandchildren. Proportion of light-eyed amongst the 0 grandchildren of light-eyed grand- =U) 2 = 180 per cent. parents . : (C) Proportion of light-eyed amongst the ) grandchildren of not-light-eyed = 11H go 13 kay grandparents : : . : () We proceed now to test the partial associations between grand- parents and grandchildren, as distinct from the total associations given above, in order to throw light on the real nature of the resemblance. There are two such partial associations to be tested : (1) where the parents are light-eyed, (2) where they are not-light-eyed. The following are the comparisons :— Grandparents and Grandchildren : Parents light-eyed. Proportion of light-eyed amongst the B 1928 grandchildren of light-eyed grand- 420), 1923 864 per cent. (BC) ~ 2231 parents . . Proportion of light-eyed amongst the grandchildren of not-light-eyed = (42) = or =T28 " grandparents . ; > . (87) 4"

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