Size of Sample Study, With Particular Reference to the Pig Survey of the Bureau of Agricultural Economics

Bradford B. Smith and Mordecai Ezekiel

No 330879, Miscellaneous Publications from United States Department of Agriculture, Economic Research Service

Abstract: Report Introduction: A considerable portion of economic forecasting is based on the "this year to last year" type of ratio. Using the semi-annual “Pig Survey" of the Division of Crop and Livestock Estimates, Bureau of Agricultural Economics, as an example, the reported number of sows farrowed this year and the reported number of sows farrowed last year are tabulated and the ratio between them taken as the ratio of the hog crop to come this year as compared with the known hog crop last year. The occasion for this study was to test the statistical accuracy of this "Sows farrowed this year to sows farrowed last year" ratio. To accomplish this required the application of some known theory and the development of some new. This paper accordingly aims (1) to set forth the theoretical considerations in measuring the accuracy of such a year-year ratio, (2) test it by application to a portion of the records used in making a pig survey, (3) draw certain conclusion specifically related to the pig survey.

Keywords: Livestock Production/Industries; Productivity Analysis; Research Methods/Statistical Methods (search for similar items in EconPapers)
Pages: 44
Date: 1924-10
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Persistent link: https://EconPapers.repec.org/RePEc:ags:uersmp:330879

DOI: 10.22004/ag.econ.330879

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