Download or read book Tcnicas De Muestreo Con Ibm Spss Sas Y Stata written by Libros Científicos and published by CreateSpace. This book was released on 2015-11-16 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Los métodos de muestreo constituyen el conjunto de técnicas estadísticas que estudian la forma de seleccionar una muestra lo suficientemente representativa de una población cuya información permita inferir las propiedades o características de toda la población cometiendo un error medible y acotable. A partir de la muestra, seleccionada mediante un determinado método de muestreo, se estiman las características poblacionales (media, total, proporción, etc.) con un error cuantificable y controlable. Las estimaciones se realizan a través de funciones matemáticas de la muestra denominadas estimadores, que se convierten en variables aleatorias al considerar la variabilidad de las muestras. Los errores se cuantifican a través de varianzas, desviaciones típicas o errores cuadráticos medios de los estimadores, que miden la precisión de estos. La metodología que permite inferir resultados, predicciones y generalizaciones sobre la población estadística, basándose en la información contenida en las muestras representativas previamente elegidas por métodos de muestreo formales, se denomina inferencia estadística.Es muy importante tener en cuenta que para medir el grado de representatividad de la muestra es necesario utilizar muestreo probabilístico. Diremos que el muestreo es probabilístico cuando pueda establecerse la probabilidad de obtener cada una de las muestras que sea posible seleccionar, esto es, cuando la selección de muestras constituya un fenómeno aleatorio probabilizable. Dicha selección se verificará en condiciones de azar, siendo susceptible de medida la incertidumbre derivada de la misma. Esto permitirá medir los errores cometidos en el proceso de muestreo (a través de la varianza u otras medidas estadísticas).En este libro se presentan las técnicas de muestreo más importantes utilizadas en el trabajo estadístico. Se comienza tratando el muestreo aleatorios simple, para, a continuación, introducir el muestreo sistemático. Posteriormente se profundiza en el muestreo estratificado y en el muestro por conglomerados monoetápico, bietápico y polietápico. Finalmente, se ponen de manifiesto las aplicaciones del muestreo en la evaluación de impacto de políticas públicas. Todos los métodos de muestreo se ilustran con aplicaciones totalmente resueltas con el software más actuala, como IBM SPSS STATISTICS, SAS y STATA.
Download or read book Muestreo estad stico a trav s de ejemplos aplicaciones con Excel SPSS SAS y STATA written by and published by . This book was released on with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book IBM SPSS STATISTICS written by Libros Científicos and published by CreateSpace. This book was released on 2015-11-16 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Los métodos de muestreo constituyen el conjunto de técnicas estadísticas que estudian la forma de seleccionar una muestra lo suficientemente representativa de una población cuya información permita inferir las propiedades o características de toda la población cometiendo un error medible y acotable. A partir de la muestra, seleccionada mediante un determinado método de muestreo, se estiman las características poblacionales (media, total, proporción, etc.) con un error cuantificable y controlable. Las estimaciones se realizan a través de funciones matemáticas de la muestra denominadas estimadores, que se convierten en variables aleatorias al considerar la variabilidad de las muestras. Los errores se cuantifican a través de varianzas, desviaciones típicas o errores cuadráticos medios de los estimadores, que miden la precisión de estos. La metodología que permite inferir resultados, predicciones y generalizaciones sobre la población estadística, basándose en la información contenida en las muestras representativas previamente elegidas por métodos de muestreo formales, se denomina inferencia estadística.Es muy importante tener en cuenta que para medir el grado de representatividad de la muestra es necesario utilizar muestreo probabilístico. Diremos que el muestreo es probabilístico cuando pueda establecerse la probabilidad de obtener cada una de las muestras que sea posible seleccionar, esto es, cuando la selección de muestras constituya un fenómeno aleatorio probabilizable. Dicha selección se verificará en condiciones de azar, siendo susceptible de medida la incertidumbre derivada de la misma. Esto permitirá medir los errores cometidos en el proceso de muestreo (a través de la varianza u otras medidas estadísticas).En este libro se presentan las técnicas de muestreo más importantes utilizadas en el trabajo estadístico. Se comienza tratando el muestreo aleatorios simple, para, a continuación, introducir el muestreo sistemático. Posteriormente se profundiza en el muestreo estratificado y en el muestro por conglomerados monoetápico, bietápico y polietápico. Finalmente, se ponen de manifiesto las aplicaciones del muestreo en la evaluación de impacto de políticas públicas. Todos los métodos de muestreo se ilustran con aplicaciones totalmente resueltas con el software IBM SPSS STATISTICS.
Download or read book Introduction to Psychometric Theory written by Tenko Raykov and published by Routledge. This book was released on 2011-01-07 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new text provides a state-of the-art introduction to educational and psychological testing and measurement theory that reflects many intellectual developments of the past two decades. The book introduces psychometric theory using a latent variable modeling (LVM) framework and emphasizes interval estimation throughout, so as to better prepare readers for studying more advanced topics later in their careers. Featuring numerous examples, it presents an applied approach to conducting testing and measurement in the behavioral, social, and educational sciences. Readers will find numerous tips on how to use test theory in today’s actual testing situations. To reflect the growing use of statistical software in psychometrics, the authors introduce the use of Mplus after the first few chapters. IBM SPSS, SAS, and R are also featured in several chapters. Software codes and associated outputs are reviewed throughout to enhance comprehension. Essentially all of the data used in the book are available on the website. In addition instructors will find helpful PowerPoint lecture slides and questions and problems for each chapter. The authors rely on LVM when discussing fundamental concepts such as exploratory and confirmatory factor analysis, test theory, generalizability theory, reliability and validity, interval estimation, nonlinear factor analysis, generalized linear modeling, and item response theory. The varied applications make this book a valuable tool for those in the behavioral, social, educational, and biomedical disciplines, as well as in business, economics, and marketing. A brief introduction to R is also provided. Intended as a text for advanced undergraduate and/or graduate courses in psychometrics, testing and measurement, measurement theory, psychological testing, and/or educational and/or psychological measurement taught in departments of psychology, education, human development, epidemiology, business, and marketing, it will also appeal to researchers in these disciplines. Prerequisites include an introduction to statistics with exposure to regression analysis and ANOVA. Familiarity with SPSS, SAS, STATA, or R is also beneficial. As a whole, the book provides an invaluable introduction to measurement and test theory to those with limited or no familiarity with the mathematical and statistical procedures involved in measurement and testing.
Download or read book Application of Structural Equation Modeling in Educational Research and Practice written by Myint Swe Khine and published by Springer Science & Business Media. This book was released on 2013-10-30 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural Equation Modeling (SEM) is a statistical approach to testing hypothesis about the relationships among observed and latent variables. The use of SEM in research has increased in psychology, sociology, and economics in recent years. In particular educational researchers try to obtain the complete image of the process of education through the measurement of personality differences, learning environment, motivation levels and host of other variables that affect the teaching and learning process. With the use of survey instruments and interviews with students, teachers and other stakeholders as a lens, educators can assess and gain valuable information about the social ecology of the classrooms that could help in improving the instructional approach, classroom management and the learning organizations. A considerable number of research have been conducted to identify the factors and interactions between students’ characteristics, personal preferences, affective traits, study skills, and various other factors that could help in better educational performance. In recent years, educational researchers use Structural Equation Modeling (SEM) as a statistical technique to explore the complex and dynamic nature of interactions in educational research and practice. SEM is becoming a powerful analytical tool and making methodological advances in multivariate analysis. This book presents the collective works on concepts, methodologies and applications of SEM in educational research and practice. The anthology of current research described in this book will be a valuable resource for the next generation educational practitioners.
Download or read book EBOOK Sustaining Change in Universities written by Burton Clark and published by McGraw-Hill Education (UK). This book was released on 2004-09-16 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: ·What can be done to ensure universities are well positioned to meet the challenges of the fast moving world of the 21st century? This is the central question addressed by Burton R. Clark in this significant new volume which greatly extends the case studies and concepts presented in his 1998 book, Creating Entrepreneurial Universities. The new volume draws on case studies of fourteen proactive institutions in the UK, Europe, Australia, Latin America, Africa, and the United States that extend analysis into the early years of the twenty-first century. The cumulative international coverage underpins a more fully developed conceptual framework offering insight into ways of initiating and sustaining change in universities. This new conceptual framework shifts attention from transformation to sustainability rooted in a constructed steady state of change and a collegial approach to entrepreneurialism. It contains key elements necessary for universities to adapt successfully to the modern world. Lessons for reform can be drawn directly from both the individual case studies and the general framework. Overall the book offers a new form of university organization that is more self-reliant and manages to combine change with continuity, traditional academic values with new managerial values. Essential reading for university administrators, faculty members, students and researchers analysing higher education, and educational policymakers worldwide, this book advocates a highly proactive approach to university change and specifies a new basis for university self- reliance. Burton R. Clark is Allan M. Cartter Professor Emeritus of Higher Education and Sociology at the University of California, Los Angeles. During his career, he has taught at five leading US universities: Stanford, Harvard, Berkeley, Yale and UCLA. He has published widely on the nature of university organization and the realistic possibilties of reform, linking research for understanding with research for use.
Download or read book Livestock Seed Division written by United States. Agricultural Marketing Service and published by . This book was released on 1993 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factor Analysis written by Jae-On Kim and published by SAGE. This book was released on 1978-11 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes various commonly used methods of initial factoring and factor rotation. In addition to a full discussion of exploratory factor analysis, confirmatory factor analysis and various methods of constructing factor scales are also presented.
Download or read book Mechanisms of Adaptation written by J.R. Spkatch and published by Elsevier. This book was released on 2014-04-24 with total page 615 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bacteria: Volume VII: Mechanisms of Adaptation explores the mechanisms of bacterial adaptations and covers topics ranging from bacterial spores, cysts, and stalks to nitrogen fixation, bacterial chemotaxis, bacteriophage growth, and the structure and biosynthesis of bacterial cell walls. The roles of appendages and surface layers in adaptation of bacteria to their environment are also considered, along with cell division in Escherichia coli. This volume is comprised of nine chapters and begins with a discussion on the structure, properties, formation, and regulation of spores, cysts, and stalks in actinomycetes, blue-green bacteria, myxobacteria, Bacillus, Azotobacter, and Caulobacter. The reader is then introduced to the biochemistry, regulation, genetics, and evolution of nitrogen fixing in organisms; the receptors involved in bacterial chemotaxis and the nature of the sensing mechanism; the outer membrane of gram-negative bacteria; and bacterial functions involved in nutrient detection and acquisition. The roles played by organelles and surface layers in the adaptation of bacteria to their environment are also examined. The final chapter deals with the regulation of, and coordination between, the multitude of events involved in cell division in Escherichia coli. This monograph will be a useful resource for microbiologists, bacteriologists, biochemists, and biologists.
Download or read book Antimicrobial Drug Resistance written by L Bryan and published by Elsevier. This book was released on 2012-12-02 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antimicrobial Drug Resistance presents information regarding the ability of organisms to resist natural and synthetically derived inhibitors. It presents the view of the authors who made significant contributions to the understanding of resistance. The book focuses on inhibitors classified as antifungal, antiviral, and antimalarial, as well as metal ions. It also covers numerous reactions, which have been genetically and biochemically analyzed in this context. Additionally, some chapters cover resistance plasmids of most of the clinically important bacteria. The book is designed to aid those involved in microbiological and pharmaceutical research on antimicrobial agents, clinical infectious diseases and medical microbiology, teaching microbiology and pharmacology, pharmaceutical marketing, and infection control.
Download or read book Women Managers Moving on written by Judi Marshall and published by Cengage Learning Business Press. This book was released on 1995 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent research shows there is a surprisingly high exodus of successful female executives from the corporate sector. This takes place at a level well beyond the conventional family-raising stage and appears to be related to more fundamental issues of life-style choice and alienation from a male corporate culture. This book explores the phenomenon through a qualitative study of 16 women who have reached middle or senior management levels and paused to review their careers. By telling their stories in detail, Marshall explores their experiences of working in male-dominated cultures, being change agents, why they decided to leave and what their next steps are. Recent research shows there is a surprisingly high exodus of successful female executives from the corporate sector. This takes place at a level well beyond the conventional family-raising stage and appears to be related to more fundamental issues of life-style choice and alienation from a male corporate culture. This book explores the phenomenon through a qualitative study of 16 women who have reached middle or senior management levels and paused to review their careers. By telling their stories in detail, Marshall explores their experiences of working in male-dominated cultures, being change agents, why they decided to leave and what their next steps are.
Download or read book Structural Equation Modeling in Educational Research written by Timothy Teo and published by Sense Pub. This book was released on 2009 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the years, researchers have developed statistical methods to help them investigate and interpret issues of interest in many discipline areas. These methods range from descriptive to inferential to multivariate statistics. As the psychometrics measures in education become more complex, vigorous and robust methods were needed in order to represent research data efficiently. One such method is Structural Equation Modeling (SEM). SEM is a statistical technique that allows the simultaneous analysis of a series of structural equations. It also allows a dependent variable in one equation to become an independent variable in another equation. It is a comprehensive statistical approach to testing hypotheses about relations among observed and latent variables. SEM is commonly known as causal modeling, or path analysis, which hypothesizes causal relationships among variables and tests the causal models with a linear equation system. As educational research questions become more complex, they need to be evaluated with more sophisticated tools. The pervasive use of SEM in the literature has shown that SEM has a potential to be of assistance to modern educational researchers. This book will bring together prominent educators and researchers from around the world to share their contemporary research on structural equation modeling in educational settings. The chapters provide information on recent trends and developments and effective applications of the different models to answer various educational research questions. This book is a critical and specialized source that describes recent advances in SEM in international academia.
Download or read book Public Transportation Quality of Service written by Luigi Dell ́Olio and published by Elsevier. This book was released on 2017-10-11 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Public Transportation Quality of Service: Factors, Models, and Applications is the first book to help researchers better understand the contributing factors that can improve public transportation perception among users. The book compiles in one place metrics currently dispersed in journal articles, government publications and book chapters. It critically analyzes currently available modeling methodologies such as the Ordered Logit/Probit model and Models of Structural Equations, highlighting their advantages and disadvantages. The book addresses models of desired quality, including the views of users and non-users, discussing the gap between desired and perceived quality. The book also examines data mining approaches such as decision trees and neural networks, showing how to involve the public in the decision-making process to create policies that encourage public transport demand. Measuring passenger’s views on public transportation is of critical concern to promote wider transit use in cities around the world. Includes insights from both theoretical and practical points of view for both researchers and practitioners Features case studies in each chapter that apply models discussed Helps readers develop and design their own studies for measuring quality of service Shows how to include perceived quality in contracts Provides access to the survey formulas and data to better enable implementation of models
Download or read book New Venture Creation written by Jeffry A. Timmons and published by Irwin Professional Publishing. This book was released on 1990 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Poultry for Profit and Pleasure written by Robyn G. Alders and published by Food & Agriculture Org.. This book was released on 2004 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication is part of a series which seeks to raise awareness amongst policymakers and agricultural support services in low and middle income countries about sustainable income generation opportunities for small-scale farmers and local communities. It contains guidance on the keeping of poultry, and topics discussed include: the history of domestic poultry production, its contribution to sustainable rural livelihoods, key components of rural poultry production, diversification and intensification issues, utilisation of poultry products. It includes examples of case studies of poultry production schemes in Bangladesh, South Africa, Guatemala, Cambodia and the Philippines.
Download or read book Advanced Econometric Methods written by Thomas B. Fomby and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book had its conception in 1975in a friendly tavern near the School of Businessand PublicAdministration at the UniversityofMissouri-Columbia. Two of the authors (Fomby and Hill) were graduate students of the third (Johnson), and were (and are) concerned about teaching econometrics effectively at the graduate level. We decided then to write a book to serve as a comprehensive text for graduate econometrics. Generally, the material included in the bookand itsorganization have been governed by the question, " Howcould the subject be best presented in a graduate class?" For content, this has meant that we have tried to cover " all the bases " and yet have not attempted to be encyclopedic. The intended purpose has also affected the levelofmathematical rigor. We have tended to prove only those results that are basic and/or relatively straightforward. Proofs that would demand inordinant amounts of class time have simply been referenced. The book is intended for a two-semester course and paced to admit more extensive treatment of areas of specific interest to the instructor and students. We have great confidence in the ability, industry, and persistence of graduate students in ferreting out and understanding the omitted proofs and results. In the end, this is how one gains maturity and a fuller appreciation for the subject in any case. It is assumed that the readers of the book will have had an econometric methods course, using texts like J. Johnston's Econometric Methods, 2nd ed.
Download or read book The Politics of the Essay written by Ruth-Ellen B. Joeres and published by Indiana University Press. This book was released on 1993-08-22 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Politics of the Essay is that rare scholarly work that provides both a history of this relatively new field and of its formal characteristics and inspires its readers to want to participate in the making of this history." -- Signs The first in-depth study of the relationship between women and essays. Employing gender, race, class, and national identity as axes of analysis, this volume introduces new perspectives into what has been a largely apolitical discussion of the essay. Includes an original essay by Susan Griffin.
