摘要:

The exact multinomial, and exact and χ2probabilities for χ2and −2 logRhave been compared. The −2 logRχ2probabilities are on average closer to the multinomial than are the corresponding χ2probabilities. The differences between the exact and χ2probabilities are usually smaller for χ2than for −2 logR. Apattern was observed among the five types of significance levels, and an explanation was proposed.

ISSN:0162-1459    

DOI:10.1080/01621459.1976.10480959

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

The power of parametric ANCOVA was compared with the power of three nonparametric ANCOVA techniques both when the parametric assumption of equal slopes was violated and when all parametric assumptions were met. The data situations involved two groups with one covariate and one criterion, normal distributions, equal group sizes, and varying slope combinations. Parametric ANCOVA maintained larger empirical power for nearly all of the data situations. Both parametric and nonparametric techniques appeared not to be robust when violation of the parametric assumption of equal slopes was coupled with unequal group sizes and distributions were normal.

ISSN:0162-1459    

DOI:10.1080/01621459.1976.10480960

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

The complete-link hierarchical clustering strategy is reinterpreted as a heuristic procedure for coloring the nodes of a graph. Using this framework, the problem of assessing goodness-of-fit in complete-link clustering is approached through the number of “extraneous” edges in the fit of the constructed partitions to a sequence of graphs obtained from the basic proximity data. Several simple numerical examples that illustrate the suggested paradigm are given and some Monte Carlo results presented.

ISSN:0162-1459    

DOI:10.1080/01621459.1976.10480961

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

This article presents estimates of the power of four tests for the independence of the disturbances from linear regression models with two sets of alternative hypotheses—second-order autoregressive processes and first-order moving average processes. The results indicate that for a number of specifications of the second-order autoregressive error structure the Durbin-Watson and Durbin alternative exact tests are more powerful than a test designed for this class of alternatives. With models including first-order moving average errors the Durbin-Watson and Durbin alternative exact test are consistently more powerful than the other tests studied for all model specifications and sample sizes.

ISSN:0162-1459    

DOI:10.1080/01621459.1976.10480962

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

Three randomized response models for quantitative data are considered, the extension of the unrelated question model first considered by Greenberg, and two models which involve the addition or multiplication of a random number from a known distribution to the sensitive value. Estimation is considered in all three models and efficiencies compared. The addition and multiplication models appear to have potential but a practical comparison of the three models is needed.

ISSN:0162-1459    

DOI:10.1080/01621459.1976.10480963

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

ISSN:0162-1459    

DOI:10.1080/01621459.1976.10480964

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

This paper suggests that user accessibility as well as speed and accuracy should be used as a criterion to evaluate algorithms for generating random variables. FORTRAN implementations of several of the best current normal algorithms are studied. Two of the algorithms were also implemented in assembler for making comparisons with other studies and for assessing the cost of accessibility. A new mixing algorithm which combines features of the convenient and fast methods of Marsaglia et al. is introduced.

ISSN:0162-1459    

DOI:10.1080/01621459.1976.10480965

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

This article presents a nonparametric Bayesian estimator of a survival curve based on incomplete or arbitrarily right-censored data. This estimator, a Bayes estimator under a squared-error loss function assuming a Dirichlet process prior, is shown to be a Bayesian extension of the usual product limit (Kaplan-Meier) nonparametric estimator.

ISSN:0162-1459    

DOI:10.1080/01621459.1976.10480966

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

A class of locally optimal tests based on linear functions of certain transformations of independent test statistics is proposed and studied. These overall tests are useful in combining independent tests for certain multivariate or multiparameter hypotheses where local optimality is interpreted in a specialized sense. For the two-sample case, along with the expressions for the null distributions of the test statistics, tabulations of percentile points are provided.

ISSN:0162-1459    

DOI:10.1080/01621459.1976.10480967

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

Among the unequal probability sampling without replacement procedures applicable for arbitrary sample size, those of Goodman and Kish and of Sampford are relatively simple to operate besides satisfying the criterion that the inclusion probability of each population unit is proportional to its size. Considering the Horvitz-Thompson estimator for estimating the population total, we show in this paper that Sampford's procedure is more efficient than the Goodman and Kish procedure. Our result is a generalization of Rao's result wherein he compared Durbin's procedure with that of Goodman and Kish.

ISSN:0162-1459    

DOI:10.1080/01621459.1976.10480968

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor