Linear Regression Models: Applications in R.

Research in social and behavioral sciences has benefited from linear regression models (LRMs) for decades to identify and understand the associations among a set of explanatory variables and an outcome variable. Linear Regression Models: Applications in R provides you with a comprehensive treatment of these models and indispensable guidance about how to estimate them using the R software environment. After furnishing some background material, the author explains how to estimate simple and multiple LRMs in R, including how to interpret their coefficients and understand their assumptions. Several chapters thoroughly describe these assumptions and explain how to determine whether they are satisfied and how to modify the regression model if they are not. The book also includes chapters on specifying the correct model, adjusting for measurement error, understanding the effects of influential observations, and using the model with multilevel data. The concluding chapter presents an alternative model⁰́₄logistic regression⁰́₄designed for binary or two-category outcome variables. The book includes appendices that discuss data management and missing data and provides simulations in R to test model assumptions. Features Furnishes a thorough introduction and detailed information about the linear regression model, including how to understand and interpret its results, test assumptions, and adapt the model when assumptions are not satisfied. Uses numerous graphs in R to illustrate the model⁰́₉s results, assumptions, and other features. Does not assume a background in calculus or linear algebra, rather, an introductory statistics course and familiarity with elementary algebra are sufficient. Provides many examples using real-world datasets relevant to various academic disciplines. Fully integrates the R software environment in its numerous examples. The book is aimed primarily at advanced undergraduate and graduate students in social, behavioral, health sciences, and related disciplines, taking a first course in linear regression. It could also be used for self-study and would make an excellent reference for any researcher in these fields. The R code and detailed examples provided throughout the book equip the reader with an excellent set of tools for conducting research on numerous social and behavioral phenomena. John P. Hoffmann is a professor of sociology at Brigham Young University where he teaches research methods and applied statistics courses and conducts research on substance use and criminal behavior.

1. Introduction2. Review of Elementary Statistical Concepts3. Simple Linear Regression Models4. Multiple Linear Regression Models5. The ANOVA Table and Goodness-of-Fit Statistics6. Comparing Linear Regression Models7. Indicator Variables in Linear Regression Models8. Independence9. Homoscedasticity10. Collinearity and Multicollinearity11. Normality, Linearity, and Interaction Effects12. Model Specification13. Measurement Errors14. Influential Observations: Leverage Points and Outliers15. Multilevel Linear Regression Models16. A Brief Introduction to Logistic Regression17. ConclusionsAppendix A: Data ManagementAppendix B: Using Simulations to Examine Assumptions of Linear Regression ModelsAppendix C: FormulasAppendix C: User-Written R Packages Employed in Examples