6k views

### Is the percent of total deviance explained a useful model summary? [duplicate]

My question is regarding the interpretation of the percent of deviance explained (and other $R^2$ anaologs or pseudo $R^2$ values for GLMs. Is this a meaningful summary statistic for models other ...
692 views

### calculating R square for a logistic regression [duplicate]

can anyone help me with how to calculate R-squared for a logistic regression- How do I use the deviance for this Purpose ? Additionaly, the question in matlab: I am calculating a psychometric ...
446 views

### Choosing between alternate pseudo R squared methods [duplicate]

My project uses logistic regression and I needed to calculate pseudo r squared to understand the explanatory power of each model. I have been using the formula below to calculate what I thought was ...
401 views

### Reporting Cox & Snell and Nagelkerke in logistical regression [duplicate]

As part of an assignment, I've been asked to report Cox & Snell and Nagelkerke values for my (logistical) regression analyses. I have been asked to interpret them as well as discuss what they ...
163 views

### Adjusted R Square For Binomial [duplicate]

mtcars=data.frame(mtcars) m=glm(vs~mpg+cyl+disp+hp+drat,family="binomial",data=mtcars) m=glm(vs~wt,family="binomial",data=mtcars) I seek to estimate pseudo-r-...
16 views

### About binary logistic regression [duplicate]

I have been told that Nagelkerke should not be used in a model of binary logistic regression, but instead a R2 as a measure of goodness of fit. So, how can I apply R2 if I am not using a linear ...
101k views

### How to calculate pseudo-$R^2$ from R's logistic regression?

Christopher Manning's writeup on logistic regression in R shows a logistic regression in R as follows: ...
40k views

### Diagnostics for logistic regression?

For linear regression, we can check the diagnostic plots (residuals plots, Normal QQ plots, etc) to check if the assumptions of linear regression are violated. For logistic regression, I am having ...
83k views

### How to calculate goodness of fit in glm (R)

I have the following result from running glm function. How can I interpret the following values: Null deviance Residual deviance AIC Do they have something to do with the goodness of fit? Can I ...
63k views

### Pseudo R squared formula for GLMs

I found a formula for pseudo $R^2$ in the book Extending the Linear Model with R, Julian J. Faraway (p. 59). $$1-\frac{\text{ResidualDeviance}}{\text{NullDeviance}}$$. Is this a common formula for ...
51k views

### Reporting results of a logistic regression

I have the following logistic regression output: ...
21k views

### Interpreting random effect variance in glmer

I'm revising a paper on pollination, where the data are binomially distributed (fruit matures or does not). So I used glmer with one random effect (individual plant)...
10k views

### Residuals for logistic regression and Cook's distance

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? Also typically when you have ...