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作者：HUGGINS, RM
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作者：EVANS, MJ; GILULA, Z; GUTTMAN, I
作者单位：Hebrew University of Jerusalem
摘要：Latent class analysis in two-way contingency tables usually suffers from unidentifiability problems. These can be overcome by using Bayesian techniques in which prior distributions are assumed on the latent parameters. Application of these techniques, however, involves some unusual computational difficulties. Bayesian techniques suitable for latent class analyses together with a remedy to the computational difficulties are discussed in this paper.
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作者：RAO, CR; WU, YH
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作者：SINGH, AC; SUTRADHAR, BC
作者单位：Memorial University Newfoundland
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作者：AITCHISON, J; HO, CH
摘要：The statistical analysis of multivariate counts has proved difficult because of the lack of a parametric class of distributions supporting a rich enough correlation structure. With increasing availability of powerful computing facilities and obvious candidate for consideration is now the multivariate log normal mixture of independent Poisson distributions, the multivariate Poisson-log normal distribution. The properties of this discrete multivariate distribution are studied and its uses in a v...
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作者：KIM, HJ; SIEGMUND, D
作者单位：Syracuse University; Stanford University
摘要：We consider likelihood ratio tests to detect a change-point in simple linear regression (a) when the alternative specifies that only the intercept changes and (b) when the alternative permits the intercept and the slope to change. Approximations for the significance level are obtained under reasonably general assumptions about the empirical distribution of the independent variable. The approximations are compared with simulations in order to assess their accuracy. For the model in which only t...
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作者：TANG, DI; GNECCO, C; GELLER, NL
摘要：A new multivariate statistic, designed to be sensitive to the alternative hypothesis that a mean vector lies in the positive orthant, rather than to all alternatives or to alternatives on a line (O''Brien, 1984), is proposed. The statistic is shown to approximate the likelihood ratio test statistic for such alternatives (Kudo, 1963; Perlman, 1969). Its null distribution is a special case of the chi-bar-squared distribution, which allows critical values to be obtained. Such a statistic may be u...
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作者：BESAG, J; CLIFFORD, P
作者单位：University of Oxford
摘要：Simple Monte Carlo significance testing has many applications, particularly in the preliminary analysis of spatial data. The method requires the value of the test statistic to be ranked among a random sample of values generated according to the null hypothesis. However, there are situations in which a sample of values can only be conveniently generated using a Markov chain, initiated by the observed data, so that independence is violated. This paper described two methods that overcome the prob...
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作者：SRIVENKATARAMANA, T; TRACY, DS
作者单位：University of Windsor
摘要：Sarndal and Swensson (1987) have given a general framework of estimation in two-phase sampling assuming arbitrary probability by sampling designs in both the phases where the selections are without replacement. This not discusses a specific with replacement version of the scheme where a ratio of two variables is suggested as a measure of size of the units and a mean of the ratios-type estimator is proposed. A comparison is made with the Raj (1965) scheme employing the difference method of esti...
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作者：SENGUPTA, S
