A differencing test

This paper proposes and applies a test procedure for misspecification in a dynamic regression model with moving average errors. The test statistics are based on testing for unit roots in the moving average process when the model is deliberately overdifferenced.     

An adaptive estimatcr frequently used in material fatigue testing

Small sample sizes in material fatigue tests give rise to an adaptive estimator of the 100(1-P)% normal percentile, which is the 100P% survival load. The mean squared relative efficiency of the best invariant estimator of normal percentiles to the adaptive estimator is dependent upon the unknown parameters only through the coefficient of variation. The adaptive estimator is shown to be more locally efficient than tl-:ebest invariant estimator over a subset of the parameter space. However, in the extreme values of P the coverage probabilities of the adaptive estimator provide little more protection than a traditional point estimator over the range of preference based on mean squared relative efficiency.     

An introduction to econometric applications of empirical process theory for dependent random variables

This paper discusses some uses in econometrics of empirical process theory for dependent rendom variables. Examples considered include non-standard parametric hypotheses tests and semiparametric estimation. The application of bracketing functional limit results is discussed in some detail     

论TBLA对商务英语口语测试的启示

基于任务的语言测试(TBLA)作为一种新的语言测试模式,成为了研究热点.口语测试作为语言测试不可或缺的一部分,在强调交际语言教学的今天越来越受到人们的关注.口语测试目标的确定、测试任务的选择和设计以及测试效度的验证是进行基于任务的商务英语口语测试所要研究的主要问题.     

Computer Use in Psychometric Assessment

The expansion of computer technology has created many possibilities for computer applications in the area of psychological testing and assessment. Test taking, scoring, and report writing can all be done with the assistance of computer technology. Although applying new technology in psychometric assessment can reduce costs to agencies and clients, make better use of professional time, and assist in delivering better services to clients, there are also some potential problems that need to be considered. This article evaluates the ways that computers can be used in psychometric assessment, points out the benefits of such use, and considers problems tha may be encountered with these uses.     

英语教学方法与测试方法的关系

英语教学与测试方法是影响英语教学效果的主要因素,英语测试方法源于教学方法。英语教学研究史上,逐渐形成了三种不同的模式:第一代体系科学前语言测试,第二代体系心理测量学——结构主义语言学测试,第三代体系交际语言测试。与其相应的英语教学方法主要有语法翻译法,直接法和交际法。了解教学法与测试法的关系,有助于教师很好地运用教学和测试方法。     

The Exact Likelihood Ratio Test for Equality of Two Normal Populations

Testing the equality of two independent normal populations is a perfect case of the two-sample problem, yet it is not treated in the main text of any textbook or handbook. In this article, we derive the exact distribution of the likelihood ratio test and implement this test with an R function. This article has supplementary materials online.     

《测量学》实践性环节的管理

对《测量学》课程的教学实验和实习等环节的管理和考查方法进行了探索 ,为提高实践性教学环节的管理水平和学生的综合素质 ,科学地考查学生的成绩提供了一些有效的方法。     

The approximation of an unbiased test with a small level for the bioequivalence problem

In the bioequivalence problem. Brown. Hwang and Munk (1997) constructed an unbiased level a test and other tests which are uniformly more powerful than the two one-sided tests procedures when a iscomparatively larger. In this paper, for a small level, an unbiased test is shown to be approxirnately constructeQ lor tnis prooiem oy using tneir Metnog. ine numerical construction is also given.