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排序方式: 共有302条查询结果,搜索用时 15 毫秒
91.
In Hong Chang 《Statistics》2013,47(2):294-305
We consider likelihood ratio statistics based on the usual profile likelihood and the standard adjustments thereof proposed in the literature in the presence of nuisance parameters. The role of data-dependent priors in ensuring approximate frequentist validity of posterior credible regions based on the inversion of these statistics is investigated. Unlike what happens with data-free priors, it is seen that the resulting probability matching conditions readily admit solutions which entail approximate frequentist validity of the highest posterior density region as well. 相似文献
92.
Credible and highest posterior density intervals for the reliability function and parameters of a two-parameter Weibull process are obtained and the estimates compared with their corresponding classical counterparts. 相似文献
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94.
Simultaneous estimation of p gamma scale-parameters is considered under squared-error loss. The problem of minimizing, subject to uniform risk domination, the Bayes risk (or more generally the posterior expected loss) against certain conjugate or mixtures of conjugate priors is considered. Rather surprisingly, it is shown that the minimization can be done conditionally, thus avoiding variational arguments. Relative savings loss (and a posterior version thereof) are found, and it is found that in the most favorable situations, Bayesian robustness can be achieved without sacrificing substantial subjective Bayesian gains. 相似文献
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97.
Mithat Gönen 《统计学通讯:理论与方法》2013,42(7):1451-1464
This article is concerned with the study of intraclass correlations in the mixed linear model. A brief account of the shortcomings of the existing meth¬ods (frequentist. likelihood and Bayesian) is followed by alternative Bayesian parametrizations involving intraclass correlations and variance ratios. Our prior specifications accommodate a priori dependencies as well as situations which involve little or no prior information. We give examples of interval estimation and hypothesis testing using data from an animal breeding study. 相似文献
98.
Ranking objects by a panel of judges is commonly used in situations where objective attributes cannot easily be measured or interpreted. Under the assumption that the judge independently arrive at their rankings by making pair wise comparisons among the objects in an attempt to reproduce a common baseline ranking w0, we develop and explore confidence regions and Bayesian highest posterior density credible regions for w0 with emphasis on very small sample sizes. 相似文献
99.
ABSTRACT In this article, Bayesian estimation of the expected cell counts for log-linear models is considered. The prior specified for log-linear parameters is used to determine a prior for expected cell counts, by means of the family and parameters of prior distributions. This approach is more cost-effective than working directly with cell counts because converting prior information into a prior distribution on the log-linear parameters is easier than that of on the expected cell counts. While proceeding from the prior on log-linear parameters to the prior of the expected cell counts, we faced with a singularity problem of variance matrix of the prior distribution, and added a new precision parameter to solve the problem. A numerical example is also given to illustrate the usage of the new parameter. 相似文献
100.
Samridhi Mehta 《统计学通讯:理论与方法》2018,47(16):4021-4028
Sihm et al. (2016) proposed an unrelated question binary optional randomized response technique (RRT) model for estimating the proportion of population that possess a sensitive characteristic and the sensitivity level of the question. In our work, decision theoretic approach has been followed to obtain Bayes estimates of the two parameters along with their corresponding minimal Bayes posterior expected losses (BPEL) using beta prior and squared error loss function (SELF). Relative losses are also examined to compare the performances of the Bayes estimates with those of the classical estimates obtained by Sihm et al. (2016). The results obtained are illustrated with the help of real survey data using non informative prior. 相似文献