共查询到20条相似文献,搜索用时 15 毫秒
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R.J. Ellis 《Serials Review》2013,39(1):15-28
AbstractStandards are essential to guide both technical and information management in providing access to and delivery of content. Standards development, implementation, and use help the information community meet the needs of its users. The information community grapples with a myriad of methods for providing access to content and capturing transaction level information about access to and use of content. Publishers struggle with ways to manage increased content flow. The author discusses the 2002 revision of the Standard for Library Statistics, NISO Z39.7 (NISO is the National Information Standards Organization, a nonprofit association founded in 1939 and accredited by the American National Standards Institute (ANSI)), and the research and assessment that went into its evolution from a static index of data elements to a Web-based data dictionary embracing U.S. and international metrics for describing and measuring information services and delivery. 相似文献
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Ryszard Zieliński 《统计学通讯:理论与方法》2013,42(7):980-992
“Nonparametric” in the title is used to say that observations X 1,…,X n come from an unknown distribution F ∈ ? with ? being the class of all continuous and strictly increasing distribution functions. The problem is to estimate the quantile of a given order q ∈ (0,1) of the distribution F. The class ? of distributions is very large; it is so large that even X nq:n , where nq is an integer, may be very poor estimator of the qth quantile. To assess the performance of estimators no properties based on moments may be used: expected values of estimators should be replaced by their medians, their variances—by some characteristics of concentration of distributions around the median. If an estimator is median-biased for one of distributions, the bias of the estimator may be infinitely large for other distributions. In the note optimal estimators with respect to various criteria of optimality are presented. The pivotal function F(T) of the estimator T is introduced which enables us to apply the classical statistical approach. 相似文献
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A survey of business schools was conducted to obtain information about the current state of the teaching of business statistics to students enrolled in M.B.A. degree programs. The survey was undertaken for and presented at a June 1986 conference on “Making Statistics More Effective in Schools of Business,” held at the University of Chicago's Graduate School of Business. Information was elicited concerning both the required statistics sequence and elective statistics courses for M.B.A. students, as well as computer usage in these courses. This article summarizes the information obtained from the survey. 相似文献
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Ronald S. Fecso William D. Kalsbeek Sharon L. Lohr Richard L. Scheaffer Elizabeth A. Stasny 《The American statistician》2013,67(4):328-340
In recent years the focus of research in survey sampling has changed to include a number of nontraditional topics such as nonsampling errors. In addition, the availability of data from large-scale sample surveys, along with computers and software to analyze the data, have changed the tools needed by survey sampling statisticians. It has also resulted in a diverse group of secondary data users who wish to learn how to analyze data from a complex survey. Thus it is time to reassess what we should be teaching students about survey sampling. This article brings together a panel of experts on survey sampling and teaching to discuss their views on what should be taught in survey sampling classes and how it should be taught. 相似文献
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为了破解抽样调查和普查面临的费用不断攀升、无回答率持续升高、调查效率和数据质量越来越低、难以满足社会日益增长的需要等难题,本文提出将基于行政记录的名录库调查作为我国官方统计调查的新思路,介绍了目前世界主要先进国家使用行政记录进行统计调查的基本情况,讨论了建立名录库调查的理论和方法,与传统的普查以及抽样调查方法进行比较,总结了名录库调查在统计工作中的重要作用,最后提出深化我国政府统计改革的若干建议. 相似文献
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信息传播媒体是人类文明进步的重要标志,从信件到电视、电话,每种新的信息传播媒体的普及运用都会随之产生新的调查方式。新一代信息传播媒体——国际互联网的出现在世纪之交叩响了信息时代的大门,它以光电的速度、多媒体的内容、双向快速的信息交流形式和全球一体化的... 相似文献
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市场调查按方法可以划分为连续调查与特定调查,特定调查已为人所知,但连续调查尚且陌生。文章拟对连续调查做简单介绍,浅析连续调查的含义和其所包含的内容及发展的必要性,进而结合全球连续调查情况分析中国连续调查的发展现状及其必要性。 相似文献
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Ove Frank 《Journal of statistical planning and inference》1977,1(3):235-264
The Horvitz-Thompson estimation theory is applied to snowball sampling and some other sampling procedures using a known or unknown graph structure in the survey population. In particular, simple graph-parameter estimators and variance estimators are obtained which are based on various kinds of partial information about the graph. 相似文献
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As an emerging industry with the amplitude prospect, the industry of market research and investigation should be a focus of attention in china. Firstly, this article analyzes the status of the development of the industry. Secondly, it puts forward some problems of the industry in China. Finally, it gives some countermeasures. 相似文献
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SURVEY is a computer program that simulates samples drawn from a hypothetical county. We use SURVEY in introductory and advanced sample survey classes to allow students to become involved in all stages of the sampling process, from designing the survey, to analyzing it, to dealing with nonresponse. 相似文献
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In this paper, we are concerned with designing surveys for detecting patches of some exploitable resource, such as a shellfish stock. We take as our objective that, if there is one or more circular patches above some specified size, then the probability of detecting at least one patch should be high. We show how the required sampling intensity can be modified in the light of information about the likely number and size of patches. The results are applied to two surveys for detecting exploitable patches of cockles ( Cerastoderma edule ). 相似文献
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全面调查因抗干扰性弱、不适应市场经济的运作方式 ,其应用范围已收缩到“规模以上” ,以求确保重点。抽样调查现时正被大力推行 ,但受到“五级政府管理经济的体制原因”、“样本框问题”、“样本代表性问题”和“调查经费不足”等四大金刚的阻遏而陷入困境。为了能“准确及时全面”地收集到政府和社会各界迫切需要的统计资料 ,本文提出一种既能保留全面调查优点、又能绕开“样本框陷井”和“代表性泥淖”的方法 ,即“目录———区域———优选”调查法 ,简称区域调查法。 一、什么是区域调查法区域调查法 ,由面积抽样调查法演变而来。我… 相似文献
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In this paper, we are concerned with designing surveys for detecting patches of some exploitable resource, such as a shellfish stock. We take as our objective that, if there is one or more circular patches above some specified size, then the probability of detecting at least one patch should be high. We show how the required sampling intensity can be modified in the light of information about the likely number and size of patches. The results are applied to two surveys for detecting exploitable patches of cockles ( Cerastoderma edule ). 相似文献