Predictor removed because of rank-deficiency in "lmer" model?
32930
What is rank deficiency, and how to deal with it?
37433
How to build a predictive model when more levels of a categorical predictor are possible than appear in the training data
129782
How can you have a non-significant multiple regression model w/ significant predictors?
26527
Conflicting results of summary() and anova() for a mixed model with interactions in lmer+lmerTest
710
Importance of predictors in multiple regression: Partial $R^2$ vs. standardized coefficients
67557
Imputation of missing values for PCA
42578
If a factor variable is to be dropped in model selection, should all levels be dropped simultaneously? If so, why?
99075
Interpreting residual diagnostic plots for glm models?
79763
What do empty (missing) values in the output of PCA or factor analysis mean in R?
142875
Moderated regression: Why do we calculate a *product* term between the predictors?
104882
Relative importance of a set of predictors in a random forests classification in R
105482
Interpreting summary function for lm model in R
21410
Comparing and contrasting, p-values, significance levels and type I error
103402
When and why do I have to use "trait" for multinomial multilevel models with MCMCglmm in R?
6089
Can I ignore coefficients for non-significant levels of factors in a linear model?
120542
Should the predictor variables be normally distributed for Poisson glm?
118333
Predictor transformation in logistic regression