摘要:

The athletic performances of men and women are compared based on worldrecord times for various distance events in swimming, running and skating. The ratio of the times of women to those of men against years is modelled through a modified exponential distribution. The rate of improvement is found to be higher for women in the three sports. Law-like relationships are observed for world-record times against distance. Although men's absolute performance is generally superior, the disparity diminishes with increasing distance.

ISSN:0266-4763    

DOI:10.1080/02664769723846

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Suppose that we have k candidates in an election and that the top m winners will be elected. Assume that the voters can select up to m (

ISSN:0266-4763    

DOI:10.1080/02664769723855

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

In this paper, we present tables with critical values for a variety of tests for seasonal and non-seasonal unit roots in seasonal time series. We consider (extensions of) the Hylleberg et al. and Osborn et al. test procedures. These extensions concern time series with increasing seasonal variation and time series with structural breaks in the seasonal means. For each case, we give the appropriate auxiliary test regression, the test statistics, and the corresponding critical values for a selected set of sample sizes. We also illustrate the practical use of the auxiliary regressions for quarterly new car sales in the Netherlands. Supplementary to this paper, we provide Gauss programs with which one can generate critical values for particular seasonal frequencies and sample sizes.

ISSN:0266-4763    

DOI:10.1080/02664769723864

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

This paper presents a design procedure for ChSP-4A(c1,c2)r plans based on Kullback-Leibler information and the minimum sum of risks. A table that gives the values of the parameters n and k indexed by the acceptable quality level (AQL) and limiting quality level (LQL) is presented, from which one can select a plan which gives a desired AQL and LQL when the producer's risk alpha= 0.05 and the consumer's risk beta = 0.10. A concluding remark for this series of five papers is given at the end of this paper.

ISSN:0266-4763    

DOI:10.1080/02664769723873

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Two pairs of confidence intervals for a proportion, similar to that of Larson, are compared. It can be shown through computer simulation experiments that, for certain values of p, the confidence interval obtained by the approximation is superior.

ISSN:0266-4763    

DOI:10.1080/02664769723882

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Families of joint distributions for describing the lifetimes of a system of components that operate under an unknown environment, when the environment follows a Weibull distribution, are derived. The reliability function for this system is calculated and several properties of the aforementioned joint distributions are investigated.

ISSN:0266-4763    

DOI:10.1080/02664769723891

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Invoking the predictive approach with a fixed population set-up, and employing initially the customary ratio and product estimators as potential predictors for the non-surveyed part of the population, we have generated sequences of ratio-based and product-based estimators. The proposed ratio-based and product-based estimators of order k are-under some practical conditions-found to be more efficient than the customary ratio and product estimators and the usual simple mean when k is chosen optimally. Under the optimal value of k, the kth-order ratio-based and product-based estimators are found to be as efficient as the linear regression estimator. We have used real population data to illustrate the efficacy of the proposed ratio-based and product-based estimators relative to the usual simple mean and the customary ratio and product estimators.

ISSN:0266-4763    

DOI:10.1080/02664769723909

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The Kappa statistic proposed by Cohen and the B statistic proposed by Bangdiwala are used to quantify the agreement between two observers, independently classifying the same n units into the same k categories. Both statistics correct for the agreement expected to result from chance alone, but the Kappa statistic is a measure that adjusts the observed proportion of agreement and ranges from- pc/(1- pc) to 1, where pc is the expected agreement that results from chance, and the B statistic is a measure that adjusts the observed area of agreement with that expected to result from chance, and ranges from 0 to 1. Statistical guidelines for the interpretation of either statistic are not available. For the Kappa statistic, the suggested arbitrary interpretation given by Landis and Koch is commonly quoted. This paper compares the behavior of the Kappa statistic and the B statistic in 3 3 and 4 4 contingency tables, under different agreement patterns. Based on simulation results, non-arbitrary guidelines for the interpretation of both statistics are provided.

ISSN:0266-4763    

DOI:10.1080/02664769723918

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The definition and construction of distributions are explored using parametric forms of the quantile distribution function. Short reviews are given of the identification and construction of such distribution functions, and of methods for estimation and testing.

ISSN:0266-4763    

DOI:10.1080/02664769723927

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

ISSN:0266-4763    

DOI:10.1080/02664769723936

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor