Author: Thomas A. Bass
Publisher: Macmillan
ISBN: 9780805057577
Category : Business & Economics
Languages : en
Pages : 324
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Book Description
Bass relates how two rumpled physicists set up computers in an adobe house in Santa Fe for a start-up company, and follows their journey into the centers of financial power where "the predictors" find investors and finally go live with real money.
Author: Per Kragh Andersen
Publisher: Springer
ISBN: 144197170X
Category : Mathematics
Languages : en
Pages : 502
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Book Description
This is a book about regression analysis, that is, the situation in statistics where the distribution of a response (or outcome) variable is related to - planatory variables (or covariates). This is an extremely common situation in the application of statistical methods in many ?elds, andlinear regression,- gistic regression, and Cox proportional hazards regression are frequently used for quantitative, binary, and survival time outcome variables, respectively. Several books on these topics have appeared and for that reason one may well ask why we embark on writing still another book on regression. We have two main reasons for doing this: 1. First, we want to highlightsimilaritiesamonglinear,logistic,proportional hazards,andotherregressionmodelsthatincludealinearpredictor. These modelsareoftentreatedentirelyseparatelyintextsinspiteofthefactthat alloperationsonthemodelsdealingwiththelinearpredictorareprecisely the same, including handling of categorical and quantitative covariates, testing for linearity and studying interactions. 2. Second, we want to emphasize that, for any type of outcome variable, multiple regression models are composed of simple building blocks that areaddedtogetherinthelinearpredictor:thatis,t-tests,one-wayanalyses of variance and simple linear regressions for quantitative outcomes, 2×2, 2×(k+1) tables and simple logistic regressions for binary outcomes, and 2-and (k+1)-sample logrank testsand simple Cox regressionsfor survival data. Thishastwoconsequences. Allthesesimpleandwellknownmethods can be considered as special cases of the regression models. On the other hand, the e?ect of a single explanatory variable in a multiple regression model can be interpreted in a way similar to that obtained in the simple analysis, however, now valid only for the other explanatory variables in the model “held ?xed”.
Author: Fevziye DOLUNAY CUĞ
Publisher: Akademisyen Kitabevi
ISBN: 6052588012
Category : Art
Languages : en
Pages : 27
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Book Description
Author: Max Kuhn
Publisher: CRC Press
ISBN: 1351609467
Category : Business & Economics
Languages : en
Pages : 266
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Book Description
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.
Author: Rob J Hyndman
Publisher: OTexts
ISBN: 0987507117
Category : Business & Economics
Languages : en
Pages : 380
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Book Description
Forecasting is required in many situations. Stocking an inventory may require forecasts of demand months in advance. Telecommunication routing requires traffic forecasts a few minutes ahead. Whatever the circumstances or time horizons involved, forecasting is an important aid in effective and efficient planning. This textbook provides a comprehensive introduction to forecasting methods and presents enough information about each method for readers to use them sensibly.
Author: Marc A. Scott
Publisher: SAGE
ISBN: 1473971314
Category : Social Science
Languages : en
Pages : 954
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Book Description
In this important new Handbook, the editors have gathered together a range of leading contributors to introduce the theory and practice of multilevel modeling. The Handbook establishes the connections in multilevel modeling, bringing together leading experts from around the world to provide a roadmap for applied researchers linking theory and practice, as well as a unique arsenal of state-of-the-art tools. It forges vital connections that cross traditional disciplinary divides and introduces best practice in the field. Part I establishes the framework for estimation and inference, including chapters dedicated to notation, model selection, fixed and random effects, and causal inference. Part II develops variations and extensions, such as nonlinear, semiparametric and latent class models. Part III includes discussion of missing data and robust methods, assessment of fit and software. Part IV consists of exemplary modeling and data analyses written by methodologists working in specific disciplines. Combining practical pieces with overviews of the field, this Handbook is essential reading for any student or researcher looking to apply multilevel techniques in their own research.
Author: Robert A. Parker
Publisher: Cambridge University Press
ISBN: 0521840635
Category : Mathematics
Languages : en
Pages : 445
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Book Description
Planning clinical research requires many decisions. The authors of this book explain key decisions with examples showing what works and what does not.
Author: Daniil Ryabko
Publisher: Springer Nature
ISBN: 3030543048
Category : Computers
Languages : en
Pages : 91
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Book Description
The author considers the problem of sequential probability forecasting in the most general setting, where the observed data may exhibit an arbitrary form of stochastic dependence. All the results presented are theoretical, but they concern the foundations of some problems in such applied areas as machine learning, information theory and data compression.
Author: David Emmick
Publisher: Lulu.com
ISBN: 0557173310
Category : Education
Languages : en
Pages : 73
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Book Description
Validity coefficients of predictors of graduate school success at Western Washington University fall in the range of .2 to .4 typically found in similar studies. Data from 2,323 students for the period 1976 and 1980 were analyzed. The correlation with GGPA was .19 for GREA; .05 for GREQ; .10 for GREV; .14 for MAT; and, .34 for VGPA. Correlations for selected subpopulations show some increase in the correlation coefficients over the total group. Subgroup correlations are compared with median correlations from previous studies. The MAT and GREV have high correlations with each other and correlate similarly with other variables. The MAT and GREV would appear to be equivalent measures. In an attempt to enlarge on the meaning of success, two criterion variables, GGPA and TIME, were analyzed. A canonical correlation of .34 (redundancy =.055) was found between these criteria and the group of predictors: GREA, GREV, GREQ, MAT, UGPA.
Author: Avidan Milevsky
Publisher: Columbia University Press
ISBN: 0231527934
Category : Social Science
Languages : en
Pages : 185
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Book Description
The most long-lasting and enduring relationship an individual can develop is with a sibling. Considering the closeness in age and early association of siblings, they can bond for a lifetime. Psychologists are beginning to appreciate the sibling link and its dynamic role in a child's social development. Beyond the mother-child dyad, sibling associations are now attributed with determining cognitive faculties, emotional balance, self-sufficiency, and peer interactions. Clarifying the complex processes of these relationships and the benefit of parental involvement, Avidan Milevsky provides a foundational text for a growing area of study. Deploying personal narrative, theoretical examinations, and empirical data, he unravels the intricacies of the sibling exchange and their function in overall family structures. He identifies the factors that make such bonds successful (or harmful) and the influence of parents in shaping these outcomes. He also evaluates the compensatory possibilities of the sibling bond when faced with the absence of a parent or friend. Variables such as age, birth order, gender, and family size are tremendous considerations, and parents hoping to enhance the sibling bond gain immensely from understanding these predictors. Milevsky shows practitioners how to educate parents and help them apply their knowledge in practice. He particularly supplies crucial perspective on "deidentification," or conscious differentiation, in which parents encourage different life paths to minimize sibling comparison and competition. A major tool for clinicians, social service providers, and educators, this book clarifies the next frontier in child development research.
