ISSN:0162-1459    

DOI:10.1080/01621459.1978.10479990

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

The purpose of this study is to investigate methodologies for constructing intercensal estimates of various characteristics of the population for small areas. The proposed methodology is illustrated mainly in the context of unemployment estimates, with one section utilizing dilapidated housing estimates. Alternative synthetic estimates of unemployment based on the 1970 Census 20-percent sample are investigated and their relative error is analyzed. The reliability of the synthetic estimates is discussed in the context of dilapidated housing estimates. Two types of regression models are studied, and the improvements obtained by excluding outliers from the regression are discussed.

ISSN:0162-1459    

DOI:10.1080/01621459.1978.10479991

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

A report is provided on an investigation of the variability of the National Crime Survey (NCS) statistics attributable to interviewers. Interpenetrated assignment patterns were used to estimate the effects of interviewers on data from the eight impact cities of the NCS cities sample. Such a design permitted estimation of the interviewers' contributions to the correlated component of response variance for a selected group of items for each impact city. The effects of NCS interviewers on the survey statistics varied among the cities and according to the nature of the statistics.

ISSN:0162-1459    

DOI:10.1080/01621459.1978.10479992

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

The number of strataL= IIiLi(i= 1, 2, …,k) depends on the number of stratifying variableskand the number of classesLifrom each; but strata are limited by cost restrictions on the number of selections, especially when these are primary selections in cluster sampling. Several stratifying variables often seem desirable both to reduce variances and to create domains. We quantify the gains of multivariate stratification in tables for 12 multivariate normal structures, withL= 12 and 36 and for three empirical studies. Even greater gains are shown for multipurpose designs, which are most common in surveys.

ISSN:0162-1459    

DOI:10.1080/01621459.1978.10479993

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

The randomized response technique was used in the 1973 National Survey of Family Growth to produce estimates of the number of women having abortions during a 12-month period in the conterminous United States. The model applied used two unrelated questions in separate half-samples, with a coin as the randomizing device. While the technique resulted in a higher estimate for the number of women with abortions than has previously been obtained through direct questions or reporting systems, it also yielded divergent estimates of abortion from the two half-samples. Possible causes for this divergence are discussed.

ISSN:0162-1459    

DOI:10.1080/01621459.1978.10479994

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

A method of sample selection for household telephone interviewing via random digit dialing is developed which significantly reduces the cost of such surveys as compared to dialing numbers completely at random. The sampling is carried out through a two-stage design and has the unusual feature that although all units have the same probability of selection, it is not necessary to know the probabilities of selection of the first-stage or the second-stage units. Simple random sampling of possible telephone numbers, within existing telephone exchanges, is inefficient because only about 20 percent of these numbers are actually telephone numbers assigned to households. The method of selection proposed reduces the proportion of unused numbers sharply.

ISSN:0162-1459    

DOI:10.1080/01621459.1978.10479995

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

The Kramer (1956), Spjøtvoll and Stoline (1975), Hochberg (1976), and Games and Howell (1976) modified forms of the Tukey test are compared with the Scheffé (1959) test for (1) rates of Type I error and (2) sensitivity to varying degrees of sample-size imbalance and variance heterogeneity when sampling from normal and skewed distributions. Only the Hochberg (1976) and Games and Howell (1976) procedures control their rates of Type I error at or below the nominal five percent level for all conditions investigated; however, the Games and Howell (1976) procedure is more powerful and always results in Type I error values which are closer to the level of significance.

ISSN:0162-1459    

DOI:10.1080/01621459.1978.10479996

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

The Bartlett-Kendall test was investigated to determine the optimum: (1) subsample size (M) for equalnjwherenjis evenly divisible; (2) strategy for equalnjwherenjis not evenly divisible by number of observations per subsamples,K, K> 1; (3) strategy for unequalnjincluding two modifications. Results for (1) indicated that a choice ofMwhich minimizes |M—K|, whereKM=nj, would typically yield highest power. For (2), highest power was obtained by keepingKas constant as possible without throwing away observations. For (3), the unmodified test gave controlled α and adequate power for constantK.The modifications yielded good α control and high power for bothKandMvaried but yielded liberal α for constantM(variedK).

ISSN:0162-1459    

DOI:10.1080/01621459.1978.10479997

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

A problem in anthropological linguistics is to reconstruct, from present-day linguistic data, a family tree depicting the ancestry of a family of languages. There are two parts to the problem. The first is to construct the family tree showing the sequence of language separations; this is analogous to classifying biological species by degree of similarity. The second is to estimate when the separations occurred. In this article, a stochastic model is given for the process of language change. Then a statistical procedure is developed for estimating the separation times and characterizing the rates of word replacement.

ISSN:0162-1459    

DOI:10.1080/01621459.1978.10479998

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

SPSS and BMDP have much in common, but they have contrasting emphases. The SPSS manual is intended for an unsophisticated audience. It has low-level statistical explanations and carefully written directions for running the programs, but not much about computational procedures. In contrast, the BMDP manual is more sophisticated, with not much statistical explanation, brief explanation of the control language, and substantial discussion of algorithms. We summarize our review with a listing of qualities which we consider important in a manual and our ratings for SPSS and BMDP.

ISSN:0162-1459    

DOI:10.1080/01621459.1978.10479999

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor