Tagged Questions
2
votes
2answers
214 views
Standardized residuals in R's lm output
I have a quick question: if I plot the diagnostic plots to an R regression, a couple of them have "Standardized Residuals" as their y-axis such as in this plot:
My question is this: what are the ...
2
votes
1answer
44 views
Explanation of a step in derivation of residuals for R lm diagnostic?
I'm reading Faraway's book (http://cran.r-project.org/doc/contrib/Faraway-PRA.pdf) to try to understand R's lm diagnostic plots. On page 72 of the book is this:
I have been trying to understand a ...
3
votes
2answers
166 views
Troublesome residual plot from linear mixed model
I have fitted the following linear mixed model based on the results of an economic game:
lmer(TotalScore~perOOgivenP+Game+(1|Subject),REML=T,data=mdl1table)->m1
...
6
votes
2answers
2k views
Interpreting residual diagnostic plots for glm models?
I am looking for guidelines on how to interpret residual plots of glm models. Especially poisson, negative binomial, binomial models. What can we expect from these plots when the models are ...
2
votes
2answers
583 views
Residuals for Logistic Regression and Cooks Distance
1) Are there any particular assumptions regarding the errors for logistic regression such as the constant variance of the error terms and the normality of the residuals?
2) Also typically when you ...
12
votes
2answers
6k views
How to read Cook's distance plots?
Does anyone know how to work out whether points 7, 16 and 29 are influential points or not?
I read somewhere that because Cook's distance is lower than 1, they are not. Am, I right?
8
votes
1answer
378 views
What type of post-fit analysis of residuals do you use?
When carrying out OLS multiple linear regression, rather than plot the residuals against fitted values, I plot the (internal) Studentized residuals against fitted values (ditto for covariates). These ...
