Sequential estimation problems for negative exponential populations

The literature on sequential estimation problems for negative exponential populations has been reviewed here, We attempt to bring in all the published and unpublished materials known to us in a fairly coherent fashion. Both the concepts and theoretical findings are discussed.     

Estimation of a process capability index for inverse gaussian distribution

In this article, interval estimates of Clements' process capability index are studied through bootstrapping when the underlying distribution is Inverse Gaussian. The standard bootstrap, the percentile bootstrap, and the bias-corrected percentile bootstrap confidence intervals are compared.     

Performance of Confidence Intervals in Regression Models with Unbalanced One-Fold Nested Error Structures

Abstract

In this article we consider the problem of constructing confidence intervals for a linear regression model with unbalanced nested error structure. A popular approach is the likelihood-based method employed by PROC MIXED of SAS. In this article, we examine the ability of MIXED to produce confidence intervals that maintain the stated confidence coefficient. Our results suggest that intervals for the regression coefficients work well, but intervals for the variance component associated with the primary level cannot be recommended. Accordingly, we propose alternative methods for constructing confidence intervals on the primary level variance component. Computer simulation is used to compare the proposed methods. A numerical example and SAS code are provided to demonstrate the methods.     

全面建设小康社会与加快民族地区发展

民族地区地域广大 ,资源丰富 ,潜在市场广阔 ,在全面建设小康社会中具有十分重要的战略地位。同时 ,民族地区经济社会发展的滞后又给全面建设小康社会带来了许多困难。只有切实克服这些困难和问题 ,才能有效地推进全面建设小康社会的伟大事业。应加大国家的扶持力度 ,认真贯彻党的民族政策 ,解放思想 ,发挥优势 ,依靠科技进步 ,采取一系列措施 ,实现民族地区的跨越式发展。     

跨跃式发展是黑龙江省民族地区全面建设小康社会的关键

本文在分析黑龙江省民族地区社会经济发展存在的差距基础之上,提出跨跃式发展是黑龙江省实现全面建设小康社会的关键,同时就促使民族地区社会经济跨跃式发展阐述了自己的看法。     

论我国民族地区的跨越式发展

跨越式发展是民族发展的一种形式,也是加快我国民族地区经济文化发展的有效途径。文章结合我国国情,分析了我国民族地区要实现跨越式发展的原因和条件,并提出了具体措施和建议。     

基于贝叶斯的Bootstrap置信区间

在许多领域中,Bootstrap成为一种数据处理的有效方法。很多情况下,模型中感兴趣的参数的置信区间难以构建,为了解决这一问题,文章提出了一个新的贝叶斯Bootstrap置信区间的估计量,并做了蒙特卡洛模拟比较,结果比经典区间估计方法和经典Bootstrap方法更优,并进行了实例分析。     

小学新任教师职业自信问题及对策

刚步入小学教师岗位的新任教师,在角色转换中往往会产生诸多的不适应,难免陷入自卑的泥潭,丧失职业自信,甚至产生辞职想法。为此,要客观认识新任教师阶段,建立教育信念与信仰,全面看待学生成绩的“进退”,做好SWOT分析与教学笔记,利用网络资源和线下交流学习,提升职业自信与职业能力。     

On the Critical Value Behaviour of Multiple Decision Procedures

In this paper we investigate the asymptotic critical value behaviour of certain multiple decision procedures as e.g. simultaneous confidence intervals and simultaneous as well as stepwise multiple test procedures. Supposing that n hypotheses or parameters of interest are under consideration we investigate the critical value behaviour when n increases. More specifically, we answer e.g. the question by which amount the lengths of confidence intervals increase when an additional parameter is added to the statistical analysis. Furthermore, critical values of different multiple decision procedures as for instance step-down and step-up procedures will be compared. Some general theoretic results are derived and applied for various distributions.     

Exact confidence regions for species assignment based on DNA markers

Assignment of individuals to correct species or population of origin based on a comparison of allele profiles has in recent years become more accurate due to improvements in DNA marker technology. A method of assessing the error in such assignment problems is présentés. The method is based on the exact hypergeometric distributions of contingency tables conditioned on marginal totals. The result is a confidence region of fixed confidence level. This confidence level is calculable exactly in principle, and estimable very accurately by simulation, without knowledge of the true population allele frequencies. Various properties of these techniques are examined through application to several examples of actual DNA marker data and through simulation studies. Methods which may reduce computation time are discussed and illustrated.