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The Number Of Missing
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Book Synopsis Flexible Imputation of Missing Data, Second Edition by : Stef van Buuren
Download or read book Flexible Imputation of Missing Data, Second Edition written by Stef van Buuren and published by CRC Press. This book was released on 2018-07-17 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Missing data pose challenges to real-life data analysis. Simple ad-hoc fixes, like deletion or mean imputation, only work under highly restrictive conditions, which are often not met in practice. Multiple imputation replaces each missing value by multiple plausible values. The variability between these replacements reflects our ignorance of the true (but missing) value. Each of the completed data set is then analyzed by standard methods, and the results are pooled to obtain unbiased estimates with correct confidence intervals. Multiple imputation is a general approach that also inspires novel solutions to old problems by reformulating the task at hand as a missing-data problem. This is the second edition of a popular book on multiple imputation, focused on explaining the application of methods through detailed worked examples using the MICE package as developed by the author. This new edition incorporates the recent developments in this fast-moving field. This class-tested book avoids mathematical and technical details as much as possible: formulas are accompanied by verbal statements that explain the formula in accessible terms. The book sharpens the reader’s intuition on how to think about missing data, and provides all the tools needed to execute a well-grounded quantitative analysis in the presence of missing data.
Download or read book Missing Numbers written by Cm Healy and published by CM Healy. This book was released on 2018-06-30 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: What does one do when the day has fewer hours than normal? This brilliantly illustrated poem brings to life the silly tale of what might happen if some of the numbers on the clock just didn't show up for work. Illness, forgetfulness, and love have all got our familiar friends preoccupied, leading to a very interesting day.
Download or read book MySQL Cookbook written by Paul DuBois and published by "O'Reilly Media, Inc.". This book was released on 2003 with total page 1026 pages. Available in PDF, EPUB and Kindle. Book excerpt: DuBois organizes his cookbook's recipes into sections on the problem, the solution stated simply, and the solution implemented in code and discussed. The implementation and discussion sections are the most valuable, as they contain the command sequences, code listings, and design explanations that can be transferred to outside projects.
Book Synopsis The Prevention and Treatment of Missing Data in Clinical Trials by : National Research Council
Download or read book The Prevention and Treatment of Missing Data in Clinical Trials written by National Research Council and published by National Academies Press. This book was released on 2010-12-21 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Randomized clinical trials are the primary tool for evaluating new medical interventions. Randomization provides for a fair comparison between treatment and control groups, balancing out, on average, distributions of known and unknown factors among the participants. Unfortunately, these studies often lack a substantial percentage of data. This missing data reduces the benefit provided by the randomization and introduces potential biases in the comparison of the treatment groups. Missing data can arise for a variety of reasons, including the inability or unwillingness of participants to meet appointments for evaluation. And in some studies, some or all of data collection ceases when participants discontinue study treatment. Existing guidelines for the design and conduct of clinical trials, and the analysis of the resulting data, provide only limited advice on how to handle missing data. Thus, approaches to the analysis of data with an appreciable amount of missing values tend to be ad hoc and variable. The Prevention and Treatment of Missing Data in Clinical Trials concludes that a more principled approach to design and analysis in the presence of missing data is both needed and possible. Such an approach needs to focus on two critical elements: (1) careful design and conduct to limit the amount and impact of missing data and (2) analysis that makes full use of information on all randomized participants and is based on careful attention to the assumptions about the nature of the missing data underlying estimates of treatment effects. In addition to the highest priority recommendations, the book offers more detailed recommendations on the conduct of clinical trials and techniques for analysis of trial data.
Book Synopsis Secondary Analysis of Electronic Health Records by : MIT Critical Data
Download or read book Secondary Analysis of Electronic Health Records written by MIT Critical Data and published by Springer. This book was released on 2016-09-09 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book trains the next generation of scientists representing different disciplines to leverage the data generated during routine patient care. It formulates a more complete lexicon of evidence-based recommendations and support shared, ethical decision making by doctors with their patients. Diagnostic and therapeutic technologies continue to evolve rapidly, and both individual practitioners and clinical teams face increasingly complex ethical decisions. Unfortunately, the current state of medical knowledge does not provide the guidance to make the majority of clinical decisions on the basis of evidence. The present research infrastructure is inefficient and frequently produces unreliable results that cannot be replicated. Even randomized controlled trials (RCTs), the traditional gold standards of the research reliability hierarchy, are not without limitations. They can be costly, labor intensive, and slow, and can return results that are seldom generalizable to every patient population. Furthermore, many pertinent but unresolved clinical and medical systems issues do not seem to have attracted the interest of the research enterprise, which has come to focus instead on cellular and molecular investigations and single-agent (e.g., a drug or device) effects. For clinicians, the end result is a bit of a “data desert” when it comes to making decisions. The new research infrastructure proposed in this book will help the medical profession to make ethically sound and well informed decisions for their patients.
Download or read book Missing, Presumed written by Alan Bailey and published by Liberties Press. This book was released on 2014-12-01 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Between 1993 and 1998, six Irish women, ranging in age from eighteen to twenty eight, disappeared. The area in which these disappearances occurred became publicly referred to as 'The Vanishing Triangle'. To date, none of the missing females have ever been located. These six unsolved cases resulted in the creation of the specialist Garda task force 'Operation Trace', set up in the hope of finding a connection between the missing women. None was found. The task force investigated dozens of unsolved cases of women gone missing in Ireland. Alan Bailey served as the National Coordinator for the task force for thirteen years, and the revealing stories in Missing, Presumedall come from his personal experiences in this role. Missing, Presumed details, and reports on, the Garda investigations into the case studies of fifteen women who disappeared over a time span of twenty years. In almost half of the cases, the women's badly mutilated bodies were recovered, sometimes months later, buried in shallow graves. Each chapter focuses on one woman's story, and details the timeline of events that led to her disappearance, beginning on the day of her disappearance through to the ensuing investigation, and up to - when lucky - a conviction. These stories are haunting, terrifying, and true. 'It is now sixteen years since Trace was established. The families and friends of both the disappeared and those whose bodies were found still await closure.'
Book Synopsis Missing Data by : Patrick E. McKnight
Download or read book Missing Data written by Patrick E. McKnight and published by Guilford Press. This book was released on 2007-03-28 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: While most books on missing data focus on applying sophisticated statistical techniques to deal with the problem after it has occurred, this volume provides a methodology for the control and prevention of missing data. In clear, nontechnical language, the authors help the reader understand the different types of missing data and their implications for the reliability, validity, and generalizability of a study’s conclusions. They provide practical recommendations for designing studies that decrease the likelihood of missing data, and for addressing this important issue when reporting study results. When statistical remedies are needed--such as deletion procedures, augmentation methods, and single imputation and multiple imputation procedures--the book also explains how to make sound decisions about their use. Patrick E. McKnight's website offers a periodically updated annotated bibliography on missing data and links to other Web resources that address missing data.
Book Synopsis Statistical Analysis with Missing Data by : Roderick J. A. Little
Download or read book Statistical Analysis with Missing Data written by Roderick J. A. Little and published by John Wiley & Sons. This book was released on 2019-03-21 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: An up-to-date, comprehensive treatment of a classic text on missing data in statistics The topic of missing data has gained considerable attention in recent decades. This new edition by two acknowledged experts on the subject offers an up-to-date account of practical methodology for handling missing data problems. Blending theory and application, authors Roderick Little and Donald Rubin review historical approaches to the subject and describe simple methods for multivariate analysis with missing values. They then provide a coherent theory for analysis of problems based on likelihoods derived from statistical models for the data and the missing data mechanism, and then they apply the theory to a wide range of important missing data problems. Statistical Analysis with Missing Data, Third Edition starts by introducing readers to the subject and approaches toward solving it. It looks at the patterns and mechanisms that create the missing data, as well as a taxonomy of missing data. It then goes on to examine missing data in experiments, before discussing complete-case and available-case analysis, including weighting methods. The new edition expands its coverage to include recent work on topics such as nonresponse in sample surveys, causal inference, diagnostic methods, and sensitivity analysis, among a host of other topics. An updated “classic” written by renowned authorities on the subject Features over 150 exercises (including many new ones) Covers recent work on important methods like multiple imputation, robust alternatives to weighting, and Bayesian methods Revises previous topics based on past student feedback and class experience Contains an updated and expanded bibliography The authors were awarded The Karl Pearson Prize in 2017 by the International Statistical Institute, for a research contribution that has had profound influence on statistical theory, methodology or applications. Their work "has been no less than defining and transforming." (ISI) Statistical Analysis with Missing Data, Third Edition is an ideal textbook for upper undergraduate and/or beginning graduate level students of the subject. It is also an excellent source of information for applied statisticians and practitioners in government and industry.
Book Synopsis Where Are the Missing People? by : Jimmy Evans
Download or read book Where Are the Missing People? written by Jimmy Evans and published by Tipping Point Press. This book was released on 2022-01-18 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this unique, practical book—written to be read by those remaining on earth after the Rapture—Jimmy Evans reveals the truth of the Bible about the end times. With compassion and deep insight into the prophecies of Scripture, he explains the disappearance of millions of believers around the world and gives future readers a glimpse into the events of the Tribulation. From the rise of the Antichrist to the ultimate redemption provided by Jesus, this hopeful book is a must-read for anyone navigating the future. Buy it for family members or friends. Leave it on your desk or coffee table. Put it in a place where a future reader can find it. The truths in this book will literally transform their lives. And it may be necessary sooner than you think.
Download or read book Missing Data written by Paul D. Allison and published by SAGE Publications. This book was released on 2001-08-13 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sooner or later anyone who does statistical analysis runs into problems with missing data in which information for some variables is missing for some cases. Why is this a problem? Because most statistical methods presume that every case has information on all the variables to be included in the analysis. Using numerous examples and practical tips, this book offers a nontechnical explanation of the standard methods for missing data (such as listwise or casewise deletion) as well as two newer (and, better) methods, maximum likelihood and multiple imputation. Anyone who has been relying on ad-hoc methods that are statistically inefficient or biased will find this book a welcome and accessible solution to their problems with handling missing data.
Book Synopsis Applied Missing Data Analysis by : Craig K. Enders
Download or read book Applied Missing Data Analysis written by Craig K. Enders and published by Guilford Press. This book was released on 2010-04-23 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: Walking readers step by step through complex concepts, this book translates missing data techniques into something that applied researchers and graduate students can understand and utilize in their own research. Enders explains the rationale and procedural details for maximum likelihood estimation, Bayesian estimation, multiple imputation, and models for handling missing not at random (MNAR) data. Easy-to-follow examples and small simulated data sets illustrate the techniques and clarify the underlying principles. The companion website includes data files and syntax for the examples in the book as well as up-to-date information on software. The book is accessible to substantive researchers while providing a level of detail that will satisfy quantitative specialists. This book will appeal to researchers and graduate students in psychology, education, management, family studies, public health, sociology, and political science. It will also serve as a supplemental text for doctoral-level courses or seminars in advanced quantitative methods, survey analysis, longitudinal data analysis, and multilevel modeling, and as a primary text for doctoral-level courses or seminars in missing data.
Book Synopsis Tacky and the Winter Games by : Helen Lester
Download or read book Tacky and the Winter Games written by Helen Lester and published by Houghton Mifflin Harcourt. This book was released on 2007-10-29 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A-huff-and-a-puff-and-a-huff-and-a-puff-and-a-huff-and-a-puff" "WHAT'S HAPPENING?" Tacky the penguin wants to know. The Winter Games, that's what's happening. And Tacky and his fellow penguins Goodly, Lovely, Angel, Neatly, and Perfect have to work hard to get in shape so they can represent Team Nice Icy Land in the athletic competitions. After rigorous training, they're ready - but are the games ready for Tacky? Will his antics keep Team Nice Icy Land from winning a medal? From bobsledless racing and ski jumping to speed skating, Tacky lends his unique, exuberant style to each competition. In laugh-out-loud scenes of Tacky and his fellow penguins' athletic debacles, Tacky reminds readers of the underlying joy and enthusiasm that propells athletes to greatness. So get ready to cheer for Team Nice Icy Land and let the games begin!
Download or read book The Cold Vanish written by Jon Billman and published by Grand Central Publishing. This book was released on 2020-07-07 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perfect for readers of Jon Krakauer and Douglas Preston, this "authentic and encyclopedic" book examines real-life cases of those who vanish in the wilderness without a trace (Roman Dial)—and those eccentric, determined characters who try to find them. These are the stories that defy conventional logic. The proverbial vanished without a trace incidences, which happen a lot more (and a lot closer to your backyard) than almost anyone thinks. These are the missing whose situations are the hardest on loved ones left behind. The cases that are an embarrassment for park superintendents, rangers and law enforcement charged with Search & Rescue. The ones that baffle the volunteers who comb the mountains, woods and badlands. The stories that should give you pause every time you venture outdoors. Through Jacob Gray's disappearance in Olympic National Park, and his father Randy Gray who left his life to search for him, we will learn about what happens when someone goes missing. Braided around the core will be the stories of the characters who fill the vacuum created by a vanished human being. We'll meet eccentric bloodhound-handler Duff and R.C., his flagship purebred, who began trailing with the family dog after his brother vanished in the San Gabriel Mountains. And there's Michael Neiger North America's foremost backcountry Search & Rescue expert and self-described "bushman" obsessed with missing persons. And top researcher of persons missing on public wildlands Ex-San Jose, California detective David Paulides who is also one of the world's foremost Bigfoot researchers. It's a tricky thing to write about missing persons because the story is the absence of someone. A void. The person at the heart of the story is thinner than a smoke ring, invisible as someone else's memory. The bones you dig up are most often metaphorical. While much of the book will embrace memory and faulty memory—history—The Cold Vanish is at its core a story of now and tomorrow. Someone will vanish in the wild tomorrow. These are the people who will go looking.
Book Synopsis Feature Engineering and Selection by : Max Kuhn
Download or read book Feature Engineering and Selection written by Max Kuhn and published by CRC Press. This book was released on 2019-07-25 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: The process of developing predictive models includes many stages. Most resources focus on the modeling algorithms but neglect other critical aspects of the modeling process. This book describes techniques for finding the best representations of predictors for modeling and for nding the best subset of predictors for improving model performance. A variety of example data sets are used to illustrate the techniques along with R programs for reproducing the results.
Book Synopsis Multiple Imputation of Missing Data Using SAS by : Patricia Berglund
Download or read book Multiple Imputation of Missing Data Using SAS written by Patricia Berglund and published by SAS Institute. This book was released on 2014-07-01 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Find guidance on using SAS for multiple imputation and solving common missing data issues. Multiple Imputation of Missing Data Using SAS provides both theoretical background and constructive solutions for those working with incomplete data sets in an engaging example-driven format. It offers practical instruction on the use of SAS for multiple imputation and provides numerous examples that use a variety of public release data sets with applications to survey data. Written for users with an intermediate background in SAS programming and statistics, this book is an excellent resource for anyone seeking guidance on multiple imputation. The authors cover the MI and MIANALYZE procedures in detail, along with other procedures used for analysis of complete data sets. They guide analysts through the multiple imputation process, including evaluation of missing data patterns, choice of an imputation method, execution of the process, and interpretation of results. Topics discussed include how to deal with missing data problems in a statistically appropriate manner, how to intelligently select an imputation method, how to incorporate the uncertainty introduced by the imputation process, and how to incorporate the complex sample design (if appropriate) through use of the SAS SURVEY procedures. Discover the theoretical background and see extensive applications of the multiple imputation process in action. This book is part of the SAS Press program.
Download or read book Missing Data written by John W. Graham and published by Springer Science & Business Media. This book was released on 2012-06-08 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: Missing data have long plagued those conducting applied research in the social, behavioral, and health sciences. Good missing data analysis solutions are available, but practical information about implementation of these solutions has been lacking. The objective of Missing Data: Analysis and Design is to enable investigators who are non-statisticians to implement modern missing data procedures properly in their research, and reap the benefits in terms of improved accuracy and statistical power. Missing Data: Analysis and Design contains essential information for both beginners and advanced readers. For researchers with limited missing data analysis experience, this book offers an easy-to-read introduction to the theoretical underpinnings of analysis of missing data; provides clear, step-by-step instructions for performing state-of-the-art multiple imputation analyses; and offers practical advice, based on over 20 years' experience, for avoiding and troubleshooting problems. For more advanced readers, unique discussions of attrition, non-Monte-Carlo techniques for simulations involving missing data, evaluation of the benefits of auxiliary variables, and highly cost-effective planned missing data designs are provided. The author lays out missing data theory in a plain English style that is accessible and precise. Most analysis described in the book are conducted using the well-known statistical software packages SAS and SPSS, supplemented by Norm 2.03 and associated Java-based automation utilities. A related web site contains free downloads of the supplementary software, as well as sample empirical data sets and a variety of practical exercises described in the book to enhance and reinforce the reader’s learning experience. Missing Data: Analysis and Design and its web site work together to enable beginners to gain confidence in their ability to conduct missing data analysis, and more advanced readers to expand their skill set.
Download or read book Private Sydney written by James Patterson and published by Random House Australia. This book was released on 2016-05-30 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Even for Private Investigations, the world's top detective agency, it's tough to find a man who doesn't exist ... Craig Gisto has promised Eliza Moss that his elite team at Private Sydney will investigate the disappearance of her father. After all, as the CEO of a high-profile research company, Eric Moss shouldn't be difficult to find. Except it's not just the man who's gone missing, all evidence he ever existed has vanished too. And there are powerful figures pulling the strings who want Moss to stay 'lost'. But when a woman is found brutally murdered and a baby is missing, Private are suddenly drawn into another frantic search. And this is a case Craig has to throw everything into, because he may well be responsible for sending the killer straight to the victim's door ...
