摘要:

summarySurvey design involves planning and documenting questionnaires, sample selection and survey operations. It constitutes a simultaneous solution to numerous interrelated conceptual and practical design issues, more than may usually be settled effectively, or even recognised, in any reasonable time by contemplation alone. The alternative is an iterative approach, making a trial plan, testing and then improving it, and, if necessary, repeating it until a satisfactory plan is evolved. Pilot testing can then become the focus of design decisions by providing relevant data and operating experience, and by using experimental methods, as a basis for adroit revision of trial survey plans. This paper concerns the planning of efficient survey design processes along these lines.

ISSN:0004-9581    

DOI:10.1111/j.1467-842X.1985.tb00543.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

summaryIn “before” and “after” surveys of Attitudes Towards Random Breath Testing in South Australia, three basic versions of the questionnaire were used. In the first, a set of “lead‐up” questions, which were designed to deliberately bias the results towards acceptance of the tests, was included before the main questions; in the second, there were no lead‐up questions; in the third, a different set of lead‐up questions was used, and was aimed at deliberately biasing the results against the tests. The results in two out of the four attempts to influence the answers (compared with no lead‐up questions) were significant in the expected direction, and in the other two cases were in the correct direction but not significant. The difference between the positive‐and negative‐biasing versions was highly significant in both cases. It is important to be aware that changes in context rather than in question wordingper secan give rise to effects which d

ISSN:0004-9581    

DOI:10.1111/j.1467-842X.1985.tb00544.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

summaryGiven that two circles overlap, the area in common is a function of the distance between their centres. This paper adopts a suitable random distribution for the intercentre distance and then derives the distribution of the area of overlap. An approximation is sought for the density function using a criterion which enables bounds to be placed on the difference between the moments of the density function and those of the approximation. This is an approach of general applicability. The importance of matching the end‐point behaviour of the density and the approximation is stressed. It is shown that the distribution of the area of overlap may be well approximated by a mixture of beta distributions in which the parameters change smoothly with the ratio of radi

ISSN:0004-9581    

DOI:10.1111/j.1467-842X.1985.tb00545.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

summaryThe problem of optimally choosing the smoothing parameter of a Fourier integral density estimator (FIE) is addressed. A new data‐based method of so doing is shown to be related to, but an improvement over, the method of Davis (1981). It is shown that Davis' method does not lead to consistent estimation of certain, principally multimodal, densities. In a simulation study involving the bimodal mixture of two normal densities, the new method is seen to represent a substantial improvemen

ISSN:0004-9581    

DOI:10.1111/j.1467-842X.1985.tb00546.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

summaryA comparison is made af three tests of uniformity for spherical vector data, and of the corresponding tests of uniformity for spherical axial data.

ISSN:0004-9581    

DOI:10.1111/j.1467-842X.1985.tb00547.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

summaryThe problem of calculating orthant probabilities for sets of variables (X1,.,Xn) is considered in the case where they are jointly normally distributed with zero means and a correlation matrix such that the correlation betweenXiandXiis zero if |i‐j|>1. An effective method is given which works for quite large n when the correlations betweenXiandXi+1have the values 1/2, 2/5, 3/10, 4/17, 5/26,. and more approximate methods are given for other values. The accuracy is investigated numericall

ISSN:0004-9581    

DOI:10.1111/j.1467-842X.1985.tb00548.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

summaryTwo important classes of tests for non‐spherical disturbances in the linear regression model involve test statistics whose null distributions and hence critical values depend on the regressors. This paper investigates the accuracy of the normal, two moment beta and four moment beta approximations to the critical values of such tests. An empirical experiment aimed at evaluating the accuracy of the approximations for a variety of tests against autocorrelation and heteroscedasticity is conducted. Overall the approximations are found to provide reasonably accurate critical values with skewness being a factor determining the degree of accurac

ISSN:0004-9581    

DOI:10.1111/j.1467-842X.1985.tb00549.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

SummaryIn this paper, a new test of the hypothesis that all the correlations between a set of variables are zero is proposed. It is based on the asymptotic behaviour of the largest of the observed correlation coefficients. Here “asymptotic” refers to the size of the correlation matrix considered. Simulations show that the critical levels, calculated using the asymptotic theory, are conservative but quite accurate, even for small correlation matri

ISSN:0004-9581    

DOI:10.1111/j.1467-842X.1985.tb00550.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

SummaryIsometry is the independence of a size variableG(X) and shape. This note characterizesG(X) =γΦXb1ias the only continuous size variable for which isometry with respect to G can continue to hold for all unequal changes of scale of the variablesXi, assuming some conditions on the ranges of theX

ISSN:0004-9581    

DOI:10.1111/j.1467-842X.1985.tb00551.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

Book reviewed in this article:Developments in Characteristic Function Theory.By Eugene Lukacs.Nonlinear Regression Modeling.By David A. Ratkowsky.An Introduction to Statistical Modelling.By Annette J. Dobson.A Come in Linear Models.By Anant M. Kshirsagar.Introduction to Linear Regression Analysis.By Douglas C. Montgomery&Elizabeth A. Peck.

ISSN:0004-9581    

DOI:10.1111/j.1467-842X.1985.tb00552.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY