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Book synopsis

This book presents methods for investigating whether relationships are linear or nonlinear and for fitting appropriate models when they are nonlinear. Data analysts will learn how to incorporate nonlinearity in one or more predictor variables in regression models for different types of outcome variables. Such nonlinear dependence is often not considered in applied research, yet nonlinear relationships are common and require adaptive regression. A standard linear analysis can produce misleading conclusions, while a nonlinear analysis can provide novel insights into data, not otherwise possible.§§A variety of examples of the benefits of modeling nonlinear relationships are presented throughout the book. Methods are covered using what are called fractional polynomials based on power transformations of primary predictor variables using real-valued powers. The book also covers how to formulate and conduct such adaptive fractional polynomial modeling in the standard, logistic, and Poisson regression contexts with univariate or multivariate outcomes, and the book provides for a comparison of adaptive modeling to generalized additive modeling (GAM) and multiple adaptive regression splines (MARS) for univariate outcomes.§§The authors have created customized SAS macros for use with adaptive regression modeling. These macros and code for conducting the analyses discussed in the book are available through the first author's website and online via the book's Springer website. Detailed descriptions of how to use these macros and their output appear throughout the book, though the methodology can be applied to other programs.§

Book details

Book category Books in English Mathematics & science Mathematics Probability & statistics

• Full title: Adaptive Regression for Modeling Nonlinear Relationships
• Author: George J. Knafl, Kai Ding
• Language: English
• Binding: Hardback
• Number of pages: 372
• EAN: 9783319339443
• ISBN: 3319339443
• ID: 02975485
• Publisher: Springer International Publishing AG
• Weight: 535 g
• Dimensions: 222 × 141 × 24 mm
• Date of publishing: 21. September 2016

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