Die geplante Erhöhung der Brausteuer für das norddeutsche Braugewerbe und deren Folgen

An Introduction to the theory of statistics

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Monograph

Identifikator:: 870052624

URN:: urn:nbn:de:zbw-retromon-491

Document type:: Monograph

Author:: Zeitz, Karl http://d-nb.info/gnd/13395689X

Title:: Die geplante Erhöhung der Brausteuer für das norddeutsche Braugewerbe und deren Folgen

Edition:: Sonderabdruck

Place of publication:: Berlin

Publisher:: Buchdruckerei Gebr. Unger

Year of publication:: 1906

Scope:: 1 Online-Ressource (61 Seiten)

Digitisation:: 2017

Collection:: Economics Books

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IIL.—ASSOCIATION. 23 If, on the other hand, it is desired to exhibit the conditions amongst the imbecile, the second will be preferable. Proportion of deaf-mutes amongst 0 the imbecile (4B)/(4) . _ . }9 2 Dep shousanl Proportion of deaf-mutes in the } 05 whole population (B)/N . . Either comparison exhibits very clearly the high degree of asso- ciation between the attributes. It may be pointed out, however, that census data as to such infirmities are very untrustworthy. Example vii.—Eye-colour of father and son (material due to Sir Francis Galton, as given by Professor Karl Pearson, Phil. Trams, A, vol. cxcv. (1900), p. 138; the classes 1, 2, and 3 of the memoir treated as light). Fathers with light eyes and sons with light eyes (4B) . 471 2 » 2 not light » (4B) . 151 »» not light " light y»' {aB) 8 » ” “ not light ,, (af) 230 Required to find whether the colour of the son’s eyes is associated with that of the father’s. In cases of this kind the father is reckoned once for each son; e.g. a family in which the father was light-eyed, two sons light-eyed and one not, would be reckoned as giving two to the class 48 and one to the class 4 B. The best comparison here is— Percentage of light-eyed amongst the sons of light-eyed fathers . : ‘ ) 76 per cent. Percentage of light-eyed amongst the sons \ 39 of not-light-eyed fathers . : ¥, 2 But the following is equally valid— Percentage of light-eyed amongst the fathers of light-eyed sons . id k } 76 per cent. Percentage of light-eyed amongst the 40 fathers of not-light-eyed sons : : » The reason why the former comparison is preferable is, that we usually wish to estimate the character of offspring from that of the parents, and define heredity in terms of the resemblance of offspring to parents. We do not, as a rule, want to make use of the power of estimating the character of parents from that of their offspring, nor do we define heredity in terms of the resemblance of parents to offspring. Both modes of statement, however, E> J De bh

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