对丢失目标总体单元抽样诓误差一种补救方法的探讨

一、抽样框误差及其分类 抽样调查的误差包括抽样误差和非抽样误差两类.对于非抽样误差,可以分为抽样框误差、无回答误差和计量误差三类.抽样框误差是由不完善的抽样框引起的误差;无回答误差是由于种种原因没有能够对被抽出的样本单元进行计量,没有获得有关这些单元的数据而引起的误差;计量误差是由调查所获得的数据与调查项目的真值不一致而产生的误差.     

论市场调查中的非抽样误差及控制

整个市场调查过程可以分为调查设计、数据收集、数据处理三个阶段。笔者按非抽样误差产生阶段的不同，将其分为设计误差、调查实施误差、统计分析误差三类。     

非抽样误差及改进探析

抽样调查中误差的控制是抽样技术的核心环节。已有的文献对抽样误差的研究成果颇丰，而对非抽样误差的探讨则稍嫌单薄。作者在本文中对几类非抽样误差的成因进行了分析，并提出了改进意见。     

丢失单位引起的抽样框误差分析及其补救方法

抽样调查的误差包括抽样误差和非抽样误差。非抽样误差是指除抽样误差以外,由于各种原因而引起的误差,可以分为抽样框误差、无回答误差和计量误差三类。抽样框误差是由不完善的抽样框引起的误差。1对丢失目标总体单位影响的测定丢失目标总体单位是抽样框误差中影响比较严重的一     

非抽样误差成因及改进探析

抽样调查中误差的控制是抽样技术的核心环节。已有的文献对抽样误差的研究成果颇丰,而对非抽样误差的探讨则稍嫌单薄。作者在本文中对几类非抽样误差的成因进行了分析,并提出了改进意见。     

《调查中的非抽样误差》

《调查中的非抽样误差》调查中的误差有两种,一类是抽样误差,它是由于抽样的随机性引起的;另一类是非抽样误差,它是指除抽样误差以外的各种原因而引起的误差。目前,在统计调查界,与抽样误差相比,对非抽样误差的研究相对滞后,且不成熟。而在调查的实践中,非抽样误...     

浅析统计调查中的非抽样误差

在统计理论中把总误差分为两类,一类是抽样误差,另一类是非抽样误差。现阶段的统计实践工作中非抽样误差在总误差中占很大比重,通过减少非抽样误差,从而降低总误差有着非常现实的重要意义。一、非抽样误差的产生非抽样误差是指除抽样误差以外的,由于各种原因而引起的误差,在抽样调查与全面调查中非抽样误差都可能存在。从调查开始时的历史数据的收集和调查方案的设计阶段,到调查的实施和数据收集阶段,以     

非抽样误差成因及改进探析

一般而言，非抽样误差可分为三类，分别是：抽样框误差、无回答误差和计量误差。笔者将围绕抽样框误差、无回答和计量误差的成因及改进展开探讨。 　　一、抽样框误差： 　　所谓的抽样框误差指目标总体和抽样总体不一致时产生的误差。 　　抽样框误差有五个来源，一是不能覆盖目标总体单位。二是抽样样本包含了非目标总体单位，包含非目标总体单位主要是由于目标总体的变化产生的误差。三是复合联接。复合联接的意思就是一个目标总体单位联接着一个以上的抽样单位。比如，有的家庭拥有两个住所、两个地址，那么他们被选中的概率就是一般家…     

网络调查的非抽样误差控制及调整方法

在网络调查中,分析和控制非抽样误差是其中的一个核心问题.本文从非抽样误差发生的不同环节,对抽样框误差、无回答误差、回答误差等典型的非抽样误差问题提出了相应的控制和调整的方法,以提高网络调查的准确性和可信度.     

非抽样误差及其控制方法

所谓非抽样误差,是与抽样误差——代表性误差相对应来说的,泛指在抽样调查的整个过程中,由于调查工作方面的原因而产生的各种误差。通常把非抽样误差也叫做调查误差或工作误差。     

Management of Electronic Serials in Academic Libraries: The Results of an Online Survey

This article presents the results of an online survey of academic librarians conducted in 2011 on the topic of electronic serials management. Since online journals had by 2011 become a major part of academic library serials collections, a central objective of this survey was to explore whether this had led to any degree of standardization in online serials management procedures across academic libraries. The focus of the survey was generally on issues affecting technical services, specifically exploring the impact of electronic serials on collection development, library staffing, and serials management tools. The responses to the survey did not reflect any significant level of uniformity among these libraries in any of these areas, suggesting that libraries primarily take into account the needs of their own institutions when formulating procedures for managing online serials.     

Management of Electronic Serials in Academic Libraries: The Results of an Online Survey

Abstract

This article presents the results of an online survey of academic librarians conducted in 2011 on the topic of electronic serials management. Since online journals had by 2011 become a major part of academic library serials collections, a central objective of this survey was to explore whether this had led to any degree of standardization in online serials management procedures across academic libraries. The focus of the survey was generally on issues affecting technical services, specifically exploring the impact of electronic serials on collection development, library staffing, and serials management tools. The responses to the survey did not reflect any significant level of uniformity among these libraries in any of these areas, suggesting that libraries primarily take into account the needs of their own institutions when formulating procedures for managing online serials.     

Seasonal patterns of fertility measures: theory and data

The distribution of births by month exhibits a seasonal pattern in most populations. The monthly marital fertility rate for an area of Bangladesh provides a good example of the seasonal periodicity. Seasonal patterns of measures of reproduction in a population of married women are considered. Equations are developed that predict the seasonal patterns of these alternative measures under the assumption that the fertility rate (R) follows a trigonometric curve. This is followed by an empirical analysis of the measures in a Bangladesh population that has a pronounced seasonal fertility. The investigation is intended both to validate the theoretical framework developed in the 1st part of the paper as well as to determine whether seasonal variation in actual populations is sufficiently large to affect the alternative measures significantly. 4 measures are considered: pregnancy prevalence (PP)--the proportion of married women who are pregnant at the survey date; mean open birth interval (MOI)--the time from the last live birth to the date of the survey for parous women and from the time of marriage to the date of the survey for nulliparous women; mean closed interval-birth (MCIB)--the mean interval between the last 2 live births for married women who have a birth in the period immediately preceding the survey date; and mean closed interval-woman (MCIW)--the mean interval between the last 2 live births for women who have had at least 2 children by the time of the survey. It is assumed that the seasonal pattern of the fertility rate of a population follows a cosine curve and that there is no trend in annual fertility from year to year. The lag and relative variability of the other measures are considered in comparison with the fertility rate curve. The predictions from this theoretical effort, when compared with observed patterns and trigonometric regression results for each measure in data from Bangladesh, are shown to be quite accurate. The figure and regression results show that R, PP, and MOI have definite seasonal periodicity, but MCIB and MCIW do not display any seasonal patterns. If there is a secular trend in fertility in addition to seasonality, these relationships between the seasonal patterns of the measures may no longer hold. There is a disadvantage to using closed interval measures, for they are unable to detect effects of limiting of childbearing in a population since they are based only on information from women who have births.     

目前中国网络调查的局限性和适用范围

网络调查的逐渐兴起和蓬勃发展,使人大有传统调查过时之感,也有人认为网络调查将很快取代传统的数据收集方法。但网络调查毕竟是一种新生事物,其方法的科学性如何?结果的有效性、准确性怎样?实践中有哪些新的理论问题需要探讨?等等,目前还没有一套完整的理论加以阐述。本文拟就     

Design-based analysis of embedded experiments with applications in the Dutch Labour Force Survey

Summary.  Previous research has proposed a design-based analysis procedure for experiments that are embedded in complex sampling designs in which the ultimate sampling units of an on-going sample survey are randomized over different treatments according to completely randomized designs or randomized block designs. Design-based Wald and t -statistics are applied to test whether sample means that are observed under various survey implementations are significantly different. This approach is generalized to experimental designs in which clusters of sampling units are randomized over the different treatments. Furthermore, test statistics are derived to test differences between ratios of two sample estimates that are observed under alternative survey implementations. The methods are illustrated with a simulation study and real life applications of experiments that are embedded in the Dutch Labour Force Survey. The functionality of a software package that was developed to conduct these analyses is described.     

Some remarks on measurement models in the structural equation model: an application for socially responsible food consumption

Considering the structural equation model (SEM), usually the main researches are based on the structural model rather than on the measurement one. So, this context implies some problems: construct misspecification, identification and validation. Starting from the most recent articles in terms of these issues, we achieve – and formalize through two tables – a general framework that could help researchers select and assess both formative and reflective measurement models with special attention on statistical implications. To show this general framework, we present a survey on customer behaviours for socially responsible food consumption. The survey was carried out by delivering a questionnaire administered to a representative sample of 332 families. In order to detect the main aspects impacting consumers’ preferences, a factor analysis has been performed. Then the general framework has been used to select and assess the measurement models in SEM. The estimation of the SEM has been worked out by partial least squares. The significance of the indicators has been tested using bootstrap. As far as we know, it is the first time that a model for the analysis of the consumers’ behaviour for social responsibility is formalized through a SEM.     

Omnibus tests of multinormality based on skewness and kurtosis

Measures of univariate skewness and kurtosis have long been used as a test of univariate normality, several omnibus test procedures based on a combination of the measures having been proposed, see Pearson, D’Agestino and Bowman (1977) and Mardia (1979). Mardia (1970) proposed measures of multivariate skewness and kurtosis, and constructed a test of multinormality based on these measures. we obtain the correlation between these measures and propose several omnibus tests using the two measures. The performances of these tests are compared by means of a Monte Carlo study.     

基于定基指数的经济社会协调发展评价方法探讨

 内容提要：经济社会协调发展是我国构建和谐社会的内在要求。本文针对现有研究成果中统计评价方法测度标准有所不同甚至差异较大的不足，尝试编制定基发展指数比较分析不同领域的发展程度。研究结果显示，城市经济发展步伐快于社会发展步伐，促进经济社会协调发展，需要大力改善医疗、交通、住房等条件，并努力增加城乡居民收入。     

基于函数性数据方法的艺术品网上拍卖竞买者出价水平影响因素研究

在分析互联网艺术品拍卖中竞买者出价水平特有影响因素的基础上,运用函数性相平面图与线性回归方法,探究出价水平及各影响因素在整个拍卖期间的动态变化情况。结果表明,在拍卖的不同阶段,推动竞买者出价水平变化的影响因素各有不同,且作用大小与作用方向在整个拍卖期间不断变化。特别指出,拍卖次序在整个拍卖期间对出价水平具有正向影响,且作用程度随着拍卖的进行逐渐增强,即序号越大、越晚参与竞拍的艺术品的最终成交金额越大。     

Survey and Analysis of Electronic Journal Licenses for Long-Term Access Provisions in Tertiary New Zealand Academic Libraries

A survey of New Zealand university and polytechnic libraries indicates what proportions of library e-journal holdings have archival rights or perpetual access clauses. The author then analyzes licenses from three universities for terms, permissions, and other details. The research indicates that less than 20% of the online holdings for most New Zealand educational libraries had a print duplicate, archive, or perpetual access right. Licenses failed to address these access and rights issues in 70% of the cases surveyed. The issues of long-term access to licensed materials are addressed in less than 30% of licenses and only by providers that are offering them.