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181.
Melvin R. Novick 《The American statistician》2013,67(2):94-96
The occurrence of missing data cells precludes a universally correct procedure for performing an analysis of variance. This is illustrated by the use of two computer routines to analyze a 2 × 3 factorial experiment with one missing cell. One of these routines does, however, provide information that may enhance the usefulness of the associated results. 相似文献
182.
Gerard E. Dallal 《The American statistician》2013,67(3):212-216
A statistical software package is a collaborative effort between a program's authors and users. When statistical analysis took place exclusively on mainframe computers, the entire statistical community was served by some three to six major packages, which helped to ensure that program errors would be quickly uncovered and corrected. The current trend toward performing statistical analysis on microcomputers has resulted in an explosion of software of varying quality, with more than 200 packages for the IBM PC alone. Since all of these programs are competing for the same base of knowledgeable users, the number of sophisticated users per package is dramatically less than for mainframe packages; the net result is that problems in any particular package are more likely to go unnoticed and uncorrected. For example, the most widely used shareware package contains major errors that should cause it to be rejected out of hand, and three best-selling packages analyze unbalanced two-factor experiments using an approximate technique originally developed for hand calculation. Several strategies are offered to help author and user reveal any problems that might be present in their software. 相似文献
183.
中央苏区制发了众多的统计报表全面反映战争和建设情况,采取多种调查统计方法确保数据真实可靠,并利用丰富的调查统计资料积极开展统计分析,及时发布统计资料,为革命战争和苏区经济建设服务。 相似文献
184.
J. N. Lye 《Econometric Reviews》2013,32(2):217-234
This paper considers a general and computationally convenient method of evaluating the distribution function of statistics that are the ratio of a bilinear form to a quadratic form. Numerous Economemc applications of the method are given. 相似文献
185.
大数据具有数据来源差异性、高维性及稀疏性等特点,如何挖掘数据集间的异质性和共同性并降维去噪是大数据分析的目标与挑战之一。整合分析(Integrative Analysis)同时分析多个独立数据集,避免因地域、时间等因素造成的样本差异而引起模型不稳定,是研究大数据差异性的有效方法。它的特点是将每个解释变量在所有数据集中的系数视为一组,通过惩罚函数对系数组进行压缩,研究变量间的关联性并实现降维。本文从同构数据整合分析、异构数据整合分析以及考虑网络结构的整合分析三方面梳理了惩罚整合分析方法的原理、算法和研究现状。统计模拟发现,在弱相关、一般相关和强相关三种情形下, Group Bridge、 Group MCP、Composite MCP都表现良好,其中 Group Bridge的假阳数最低且最稳定。最后,将整合分析用于研究具有来源差异性的新农合家庭医疗支出,以及具有超高维、小样本等大数据典型特征的癌症基因数据,得到了一些有意义的结论。 相似文献
186.
王视环 《南京邮电大学学报(社会科学版)》2010,12(4):117-120
项目教学法以课程内容为中心,学生为主体,把学生融入有意义的项目任务中,使学生积极主动地学习知识,同时提高学生的实践技能和团队精神。实践表明,在移动通信课程教学中应用项目教学法能取得良好的教学效果。 相似文献
187.
出生性别比影响因素的通径分析——以第五次全国人口普查数据为基础 总被引:1,自引:0,他引:1
茅倬彦 《南京人口管理干部学院学报》2006,22(4):13-16
根据我国的特殊情况,分别建立了城市和农村两个模型,并利用第五次全国人口普查的县(区)级单位数据,对出生性别比变化的直接和间接影响因素进行通径分析,发现:家庭规模和教育水平对城市的出生性别比影响较大,而医疗、经济发展和教育水平对农村的出生性别比影响显著,据此提出,降低出生性别比应采取加大现代生育观念的宣传力度、形成先进生育文化舆论环境、着力提高女性的文化程度和相应的社会地位以及加强对农村医疗服务机构的规范化管理等针对性措施。 相似文献
188.
Berdj Kenadjian 《The American statistician》2013,67(1):2-4
U. S. National Income Series Revised—Congress Votes No on Censuses of Business and Manufactures—Britain Revises Living Cost Index-U. S. and U. K. Surveys Uncover Lacks in Statistical Training-Forthcoming Statistical Conferences 相似文献
189.
Creativity is vital to the learning process of social work students. Despite its importance, educators are still uncertain of ways to enhance creativity and translate it from classroom to practice. Therefore, this study examines social work student perspectives on ways to define creativity, infuse it into the classroom, and apply it as practitioners. This study qualitatively explores the open-ended insights of 37 social work students. Through an unguided semantic analysis and application of Kolb’s experiential learning theory, the following themes emerged: classroom, creativity, performance, activities, and ideas. These themes indicate that students believe that additional creative opportunities in their classrooms would eventually benefit them as practitioners. Further pedagogical emphasis on increasing student creativity through experiential learning activities would be beneficial. 相似文献
190.
Nick Bernards 《Globalizations》2017,14(6):944-957
This article examines the politics of governing forced labour. It develops and applies an approach drawing on Marx’s conception of the historical formation of ‘free’ labour in the process of ‘primitive accumulation’ and Gramsci’s conception of the ‘relations of force’. Viewed through this lens, rather than representing discrete ontological categories, the boundary between ‘free’ and ‘forced’ labour is repositioned as largely a contested and ambivalent artefact of governance. The concept of the ‘political relations of force’ highlights the ways in which such constructions are shaped by complex intersections between a diversity of different social forces. This approach is subsequently applied in an analysis of an International Labour Organization project on dealing with ‘traditional slavery’ in Niger. 相似文献