Die Schweiz

Bibliographic data

Monograph

Identifikator:: 1008917265

URN:: urn:nbn:de:zbw-retromon-19129

Document type:: Monograph

Author:: Flückiger, Otto http://d-nb.info/gnd/117736708

Title:: Die Schweiz

Edition:: Zweite Auflage

Place of publication:: Zürich

Publisher:: Druck und Verlag von Schultheß & Co.

Year of publication:: 1914

Scope:: 1 Online-Ressource (VI, 243 Seiten)

Digitisation:: 2017

Collection:: Economics Books

Usage license:: Get license information via the feedback formular.

Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: Die Landwirtschaft

Collection:: Economics Books

THEORY OF STATISTICS. If § denote the excess of (AB) over (4B), then, in order tc keep the totals of rows and columns constant, the general table (¢f. the table for the case of independence on p. 27) must be of the form Attribute. Attribute. Total. 5 8 he (AB), +3 (AB)y—-d - (4) a (aB)y— 3 (aB)y +0 (a) Total “= (B) (R) | v Therefore, quite generally we have— (4B) - (4B), = (af) = (aB)y = (4B), = (48) = (@B), = (aB). 12. The value of this common difference 8 may be expressed in a form that is useful to note. We have by definition — 5= (4B) - (4B), = (4B) - Lh Bring the terms on the right to a common denominator, and express all the frequencies of the numerator in terms of those of the second order ; then we have— rl (ABIAB) + (B+ 48) + 0] \ -[(4B) + (4B)][(45) + («B)] = 1 {4B)oP) - (B)(4B) | That is to say, the common difference is equal to 1/Nth of the difference of the cross products” (4.B)(af) and (aB)(4f). It is evident that the difference of the cross-products may be very large if IV be large, although 8 is really very small. In using the difference of the cross-products to test mentally the sign of the association in a case where all the four second-order frequencies are given, this should be remembered : the difference should be compared with , or it will be liable to suggest a higher degree of association than actually exists. Example ix.—The following data were observed for hybrids of 36

Access restriction

Copyright

Object: error

Monograph

Chapter

Table of contents

Download

Monograph

Chapter

This page

Image fragment

Citation links

Citation recommendation