Determining Sample Size Using Fast and Slow Thinking

ABSTRACT

Using SPSS's bootstrapping procedures, this article demonstrates an approach to determining sample size that combines fast (heuristics or rules-of-thumb) and slow (statistical power analysis) thinking to balance statistical power, precision, and practicality. Sample size is determined for six commonly used statistical procedures: independent groups t-test, one-way ANOVA, one-way MANOVA, Pearson's r correlation, linear regression, and logistic regression. Overall, findings suggest that both approaches may under or over-estimate sample size. Both approaches yielded similar parameter and confidence interval estimates, but varied, sometimes by a factor of two, in their sample size requirements. It is hoped that this study's procedure and results will provide beginning reference points for sample size determination, and encourage researchers continue to search for resolutions for often difficult sample-size decisions.     

Homogeneity test, sample size determination and interval construction of difference of two proportions in stratified bilateral-sample designs

In stratified otolaryngologic (or ophthalmologic) studies, the misleading results may be obtained when ignoring the confounding effect and the correlation between responses from two ears. Score statistic and Wald-type statistic are presented to test equality in a stratified bilateral-sample design, and their corresponding sample size formulae are given. Score statistic for testing homogeneity of difference between two proportions and score confidence interval of the common difference of two proportions in a stratified bilateral-sample design are derived. Empirical results show that (1) score statistic and Wald-type statistic based on dependence model assumption outperform other statistics in terms of the type I error rates; (2) score confidence interval demonstrates reasonably good coverage property; (3) sample size formula via Wald-type statistic under dependence model assumption is rather accurate. A real example is used to illustrate the proposed methodologies.     

从“八一精神”的弘扬看社会主义核心价值体系建设

八一精神可以概括为:追求真理,坚定信念;勇于拼搏,不怕牺牲;敢为人先,开拓创新。八一精神为社会主义核心价值体系的建设提供了精神力量。因此,要加强社会主义核心价值体系建设,必须大力弘扬八一精神。     

When Feminists Don't Fit The Case of Pauline Hanson

The rise of the Far Right is a global phenomenon traditionally viewed as antithetical to feminism. However, in Australia from 1996–2001 Far Right politics was dominated by a woman, Pauline Hanson, thus calling into question the dynamics between organized feminism and the Far Right. A significant problem for Australian feminists trying to understand Hanson is that her ideology, activities and life-style are internally contradictory. This article draws on American analyses of similar women and examines the contradictions in Hanson's political philosophy and activism with a view to challenging current Australian feminist analysis of this controversial political woman.     

基于马克思主义法律统一观的法律全球化反思

马克思主义法律统一观是在马克思恩格斯分析和批判资本主义社会的过程中形成的,是世界历史理论的法律命题。受历史和地域条件的制约,马克思恩格斯对法律走向统一的判断也有一定的局限。尽管如此,马克思主义法律统一观在当代依然具有重要价值,是我们反思法律全球化的重要理论法宝。中国应以马克思主义法律统一观为指导,勇于投入到法律全球化的浪潮中,抓住法律全球化的机遇,迎接法律全球化的挑战,努力由法律全球化中的学习者成长为法律全球化中的引领者,担负起法律全球化世界性建构的责任。     

我国出口“一带一路”沿线重点国家或地区高铁列车产品认证策略研究

动车组作为高速铁路的核心装备,随着“一带一路”铁路建设项目的进展正在积极“走出去”。我国出口“一带一路”沿线重点国家或地区高铁产品认证过程中面临准入制度和技术标准差异较大、尚未形成检验检测认证互认格局、认证过程复杂的问题,按照产品认证特点和难度将国家或地区划分为四类,代表国家或地区分别是欧盟、印尼、非洲、俄罗斯。针对不同国家或地区的具体情况,我国出口“一带一路”沿线重点国家或地区高铁列车产品认证的应对策略,可以分别从参与国际铁路标准制订和修订、建立适用于高速动车组国际化技术规范体系、不同国家采取不同的市场推广战略、争取尽快获得TSIs采信实现自主检测四方面各有侧重的开展认证工作。     

新疆协商民主发展的价值基础在于一体与多元的共存

新疆协商民主发展必须建立在正确的价值基础之上,必须体现各民族共同当家作主,必须有利于国家的统一和社会的稳定。因此,新疆协商民主发展必须坚持一体与多元共存的价值基础,坚持人民民主的国家性质和中国共产党的领导,反对“三股势力”的渗透,在尊重多元文化前提下培养少数民族的国家认同意识、公民意识和协商意识。     

TRIPS协议下我国知识产权司法保护的新机制探究

《与贸易有关的知识产权协议》（TR IPS协议）作为第一个在多边贸易框架内达成的知识产权保护协议,是当今世界范围内知识产权保护领域中保护范围广、保护标准高、保护力度大的一个国际公约。如何运用TR IPS的有关规定来促进我国的国际科技合作、维护经济安全与经济利益,是一个十分重要的课题。因此,在正视我国现有知识产权司法保护机制存在的问题的基础上,全面理解TR IPS协议精神,加快与该协议有关措施的本土化进程,建立新型有效的司法保护机制,以期达到保护我国经济安全与经济利益的目的。     

也可以这样写“好文章”

好作文不是样板戏。如果我们能从自己的切身体验中选取素材,用独到而敏锐的眼光去捕捉到这些平凡人事中的时代特色,用真情实感抒发出来,仍不失为一篇优秀文章。     

经济、管理类专业《统计学》课程建设的几个基本问题

内容提要：本人认为,目前在我国经济、管理类专业《统计学》课程建设中尚有一些基本理论问题需要讨论清楚。例如,怎样理解“统计学是一门数据科学”这一命题,以及课程改革后的《统计学》与改革前的《社会经济统计学原理》究竟有什么本质上的区别;《统计学》课程中用于对重复随机试验进行统计推断的样本和抽样调查中的样本有什么区别和联系;应用社会经济调查数据进行统计分析较之应用实验数据进行统计分析有什么特殊性的问题需要解决,等等。文章找出了这些问题的若干误区并阐述了作者的个人见解。