摘要:

This article describes a population estimating technique which is designed to facilitate the study of population trends during postcensal periods. By using current vital statistics, population estimates for groupings of area are obtained which are sufficiently accurate to permit inferences to be made concerning growth or decline since the last census.

ISSN:0162-1459    

DOI:10.1080/01621459.1950.10483348

出版商:Taylor & Francis Group    

年代:1950

数据来源: Taylor

摘要:

If, in sampling from an existent population, we wish to know the regression ofuonv, a line is fitted by least squares, minimizing the sum of the squared residuals ofv(ory). If there is no error in measuring the independent variateu, regardless of whether the dependent variate has been measured without error asvor with error asy, the regression is an estimate of the true regression. If, however, the independent variate is measured with error inx, the regression obtained is a biassed one. The bias will characterize the fitted line, and will be present whether the sample is a random one of the entire population or has been taken at preassigned selected values ofx.

ISSN:0162-1459    

DOI:10.1080/01621459.1950.10483349

出版商:Taylor & Francis Group    

年代:1950

数据来源: Taylor

摘要:

The estimation of the parameters of dosage response curves by the standard probit method is an iterative process beginning with approximations to the parameters and using one or more cycles of computations to “improve” these estimates until they converge. The present paper gives a table and method for computing the maximum likelihood solution which converges more rapidly than the standard probit method. A procedure is presented for obtaining more accurate initial approximations, and the problem of the bias of the maximum likelihood estimates in small samples is considered.

ISSN:0162-1459    

DOI:10.1080/01621459.1950.10483350

出版商:Taylor & Francis Group    

年代:1950

数据来源: Taylor

摘要:

Sources and formulas for obtaining probability values for the common tests of statistical hypotheses are listed with an indication of the scope and utility of each. Examples are given which illustrate methods of calculating probability values outside the range of available tables for a large group of important tests.

ISSN:0162-1459    

DOI:10.1080/01621459.1950.10483351

出版商:Taylor & Francis Group    

年代:1950

数据来源: Taylor

摘要:

This paper considers problems to be overcome in the measurement of the productivity of labor. A listing of pertinent factors affecting the productivity appears, and indexes which adjust for some of them are presented.

ISSN:0162-1459    

DOI:10.1080/01621459.1950.10483352

出版商:Taylor & Francis Group    

年代:1950

数据来源: Taylor

摘要:

In computing mortality rates from insurance data, the unit of measurement used is frequently based on number of policies or amount of insurance rather than on lives. Then the death of one person may result in several units of “death” with respect to the investigation; moreover, the number of units per individual may vary noticeably. Thus the usual large sample methods of obtaining significance tests and confidence intervals for the true value of the mortality rate are not applicable to these situations. If the number of units associated with each person in the investigation were known, accurate large sample results could be obtained; however, determination of the number of units associated with each individual would require an extremely large amount of work. This article presents some valid large sample tests and confidence intervals for the mortality rate which do not require much work and are reasonably efficient. More general situations are also considered.

ISSN:0162-1459    

DOI:10.1080/01621459.1950.10483353

出版商:Taylor & Francis Group    

年代:1950

数据来源: Taylor

摘要:

A. Wald's method of minimum risk is illustrated by a simple rule for deciding whether to adopt any recommended system for betting on race horses. A detailed example is given. Extensions to more realistic problems about horse betting and to more dignified risk opportunities such as quality control are suggested.

ISSN:0162-1459    

DOI:10.1080/01621459.1950.10483354

出版商:Taylor & Francis Group    

年代:1950

数据来源: Taylor

摘要:

A model is established for consistent form of altering a process which would have been “in control” if left alone. This interference has the expected effect of increasing the apparent standard deviation of the variable. For the model considered, all first and second order moments and the serial correlations are calculated. The limiting values of these moments are shown.

ISSN:0162-1459    

DOI:10.1080/01621459.1950.10483355

出版商:Taylor & Francis Group    

年代:1950

数据来源: Taylor

摘要:

One frequently encounters the need of a rational selection of sample size when it is desired to estimate the standard deviation. Changing the permissible error of the estimate from an absolute to a relative one is acceptable in many cases and permits an exact,a priorisolution to the problem of sample size without involving any previous estimates.

ISSN:0162-1459    

DOI:10.1080/01621459.1950.10483356

出版商:Taylor & Francis Group    

年代:1950

数据来源: Taylor

摘要:

A nation-wide test on the completeness of birth registration was carried out in 1940 in connection with the Decennial Census of Population and Housing. The present paper discusses the comparison, based on this data, of two methods of obtaining per cent completeness of birth registration by states: 1) by relating a matched set of records for the state as a whole to the total group of matched and unmatched records combined; and 2) by a cumulative technique suggested by Chandra Sekar and Deming in the March issue of the Journal. Differences in the results by the two methods were minor except in those areas having a comparatively high degree of under-registration.

ISSN:0162-1459    

DOI:10.1080/01621459.1950.10483357

出版商:Taylor & Francis Group    

年代:1950

数据来源: Taylor