Solving Errors with the $ operator in R: A Step-by-Step Guide Using the nonnest Package

Understanding the MEEM Error in Linear Mixed-Effect Models in R: A Step-by-Step Guide to Resolving Multicollinearity Issues

Understanding Model Specification in GLMM with R's glmer for Generalized Linear Mixed Models: A Step-by-Step Approach to Capturing Hierarchical Data Structures

Understanding Polynomial Models: Correctly Interpreting Random Coefficients in Regression Analysis