Versand- und Zollvorschriften im Verkehr mit dem Ausland [Im Aufl. d. Bergischen Industrie u. Handelskammer zu Reimacheid zusgest u. bearb von d. Zollauskunftstelle d. Handelskammer]

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Monograph

Identifikator:: 1757028552

URN:: urn:nbn:de:zbw-retromon-135495

Document type:: Monograph

Title:: The agricultural output of England and Wales 1925

Place of publication:: London

Publisher:: Stat. Off.

Year of publication:: 1927

Scope:: XV, 152 Seiten; graph. Darst., Kt.

Digitisation:: 2021

Collection:: Economics Books

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Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: Chapter IV. Number and distribution of livestock

Collection:: Economics Books

142 THEORY OF STATISTICS. graphical interpolation (¢f. Chap. VII. §§15, 16). Thus for the distribution of pauperism, Example ii., we have 632+-4=158 Total frequency under 2:25 per cent. =138 Difference = 20 Frequency in interval 2:25 — 2-75 = 89 Whence @, =2-25 + > x 0-5 = 2-362 per cent. Similarly we find @, =4-130 0 Hence O= hse = (0-884 i It is left to the student to’ check the value by graphical interpolation. 23. For distributions approaching the ideal forms of figs. 5 and 9, the semi-interquartile range is usually about two-thirds of the standard deviation. Thus for Example ii. we find Q@ 0884 YT =071. The distribution of statures, Example iii., gives the ratio 0°68. The short series of wage statistics in Example i. could not be expected to give a result in very strict conformity with the rule, but the actual ratio, viz. 0°61, does not diverge greatly. It follows from this ratio that a range of nine times the semi: interquartile range, approximately, is required to cover the same proportion of the total frequency (99 per cent. or more) as a range of six times the standard deviation. 24. Of the three measures of dispersion, the semi-interquartile range has the most clear and simple meaning. It is calculated, like the median, with great ease, and the quartiles may be found, if necessary, by measuring two individuals only. If, e.g., the dispersion as well as the average stature of a group of men is required to be determined with the least possible expenditure of time, they may be simply ranked in order of height, and the three men picked out for measurement who stand in the centre and one-quarter from either end of the rank. This measure of dispersion may also be useful as a makeshift if the calculation of the standard deviation has been rendered difficult or impossible owing to the employment of an irregular classification of the frequency or of an indefinite terminal class. Such uses are, however, a little exceptional, and, generally speaking, the N

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