摘要:

This paper presents a time-saving method for computing an iterated moving average with triangular weights to better represent the trend-cycle elements in a time-series for measuring seasonal variation. A printing-adding machine is used to obtain progressive summation of theY-data values of a time series. A stencil having three suitably spaced slots is used to disclose progressively the three terms which are summed to obtain the graduated series required. Multiplied by the reciprocal of the weights the graduated series is reduced to the moving average desired. The moving average is extended to both ends of the series by means of a truncated weight function. Computation of the seasonal indexes is otherwise conventional.

ISSN:0162-1459    

DOI:10.1080/01621459.1962.10482156

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

This note deals with a waiting time problem. The probability distribution of the number of independent random drawings, if the probability of success at a single drawing is constant, is well known and is usually referred to as Pascal distribution. It may be looked upon as a probability distribution of the number of drawings from an infinite population. The present note is concerned with the generalization of this result to the case of drawings (without replacement) from a finite population.

ISSN:0162-1459    

DOI:10.1080/01621459.1962.10482157

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

In the census survival ratio method, one of the common assumptions is that the proportion which the enumerated population in any age-sex group bears to the actual population is the same at each census for each state as for the nation. The significance of this assumption is examined and it is established that such an assumption is not necessary. It is therefore replaced by a less stringent assumption, namely that the ratio of the degree of enumeration in a state (i.e. the proportion which the enumerated population in any age-sex group bears to the true population) to that of the nation is the same for the same cohort. In the light of the change in assumption, it is shown that much of the criticism of the method made by Daniel O. Price is untenable. Though his main conclusion (i.e. small relative differences in estimates of net migration should be interpreted with extreme caution) is correct, the errors in migration rates estimated by the census survival ratio method are probably much smaller than his analysis suggests.

ISSN:0162-1459    

DOI:10.1080/01621459.1962.10482158

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

This paper shows the relationship between two existing methods of generating unbiased ratio and regression estimators. One procedure involves splitting up the population (theoretically) while the other splits up the sample itself. The two procedures yield similar estimators and are combinatorially equivalent. They are unalike in that they utilize different conditional arguments.

ISSN:0162-1459    

DOI:10.1080/01621459.1962.10482159

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

LetX1andX2be normally distributed random variables with zero means, variances σ11and σ22, respectively and covariance σ12. Let

ISSN:0162-1459    

DOI:10.1080/01621459.1962.10482160

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

Estimating the Circular Probable Error (CEP) is of considerable importance in weapon-testing and other technological problems. In this paper four estimates of the CEP, based on the mean deviation, the range and the mean successive difference are suggested. Their variances are calculated for the sample size 2 to 20. These estimates are compared for efficiency with the maximum likelihood estimate and with other estimates suggested recently by Moranda [3]. The relative merits of the proposed estimates are discussed and the situations in which they are appropriate are mentioned.

ISSN:0162-1459    

DOI:10.1080/01621459.1962.10482161

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

Applied Statistical Decision Theory.Howard Raiffa and Robert Schlaifer. Boston, Massachusetts: Division of Research, Harvard Business School, 1961. Pp. xxviii, 356. $9.50. Reviewed by Harry V. Roberts

ISSN:0162-1459    

DOI:10.1080/01621459.1962.10482162

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

This article has no abstract

ISSN:0162-1459    

DOI:10.1080/01621459.1962.10482145

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor