Linked Questions

7 votes
1 answer
53k views

Computing Confidence Intervals for Coefficients in Logistic Regression [duplicate]

After fitting a logistic regression model in R using model <- glm(y~x,family='binomial') I can obtain the confidence intervals for the fitted coefficients using <...
jon_simon's user avatar
  • 2,049
1 vote
0 answers
21 views

Discrepency between p value and confidence interval in glm [duplicate]

Consider estimating the binomial success parameter using glm. ...
Demetri Pananos's user avatar
0 votes
0 answers
18 views

SPSS vs R confidence interval [duplicate]

When I performed logistic regression and generated a confidence interval of the odds ratio with R using confint, it gave a different confidence interval than the ...
Gaukulius's user avatar
47 votes
3 answers
77k views

Calculating confidence intervals for a logistic regression

I'm using a binomial logistic regression to identify if exposure to has_x or has_y impacts the likelihood that a user will click ...
celenius's user avatar
  • 1,542
16 votes
3 answers
16k views

Different ways to produce a confidence interval for odds ratio from logistic regression

I am studying how to construct a 95% confidence interval for odds ratio from the coefficients obtained in the logistic regression. So, considering the logistic regression model, $$ \log\left(\frac{p}{...
Márcio Augusto Diniz's user avatar
9 votes
2 answers
4k views

What method is used to calculate confidence intervals in R's MASS package function confint.glm?

What method is used to calculate confidence intervals in R's MASS package function confint.glm? The helpfile states that: ...
fmark's user avatar
  • 4,987
5 votes
2 answers
166 views

Why do I get a negative chi-squared value in my type III ANOVA output for my binomial GLM?

I am trying to look at how the likelihood of event X occurring is affected by three factors A (5 levels), B (2 levels) and C (3 levels). To do this I have run a binomial glm followed by a type 3 ANOVA ...
Insect_biologist's user avatar
3 votes
2 answers
237 views

statistical significance of A B test if some observation are removed due to errors

I have ran an A/B test and using chi-square test of independence, results shows that group A improves on group B by less than 5% (statistically significant) YAY!!! Unfortunately, after few checks I ...
DarioB's user avatar
  • 147
3 votes
1 answer
534 views

Dealing with quasi-complete separation in General Additive Model?

I am modelling influence of fire on occurrence of certain bird species (count response variable) in Before/after control/impact experiment design. I've got intact and burned sites and count data both ...
Michał Walesiak's user avatar
1 vote
0 answers
461 views

Logistic regression: variable coefficient is statistically significant but not statistically significant as an exponentiated odds ratio?

As mentioned in the title. I came across this instance using GLM in R. Is this an error? EDIT: The p-value of the coefficient was calculated by GLM in R and is less than 0.05. I then plotted the odds ...
haaris's user avatar
  • 61
3 votes
1 answer
243 views

How can I calculate confidence intervals of a probability obtained by my logistic regression model?

I have fit my own logistic model and I am using it to calculate the probabilities of different outcomes. I would like to know how I can obtain the confidence intervals of these probabilities. I am ...
Escachator's user avatar
1 vote
1 answer
308 views

Differences between P value and confidence interval for calculated OR

I have returned to a piece of work and was re-running some statistical analysis. I found differences in the P values (which is > 0.05) and OR confidence intervals which was greater than 1. Is there ...
Pras_V's user avatar
  • 11
4 votes
0 answers
197 views

Calculating confidence intervals for coefficients in ordinal logistic regression

I've fitted an ordinal logistic regression model in R using MASS::polr and I am looking to compute confidence intervals for the fitted coefficients. Here is the (...
damtheduck's user avatar
2 votes
1 answer
88 views

How to calculate the Std. Error of estimates and 95% Confidence interval of the odds ratio of the logit model?

For a simple data set: ...
Dan Li's user avatar
  • 179
1 vote
0 answers
127 views

Can't reproduce confint profile likelihood results

I'm trying to follow this answer here and the linked paper. But I can't seem to get the same results as the confint gives. Sometimes I get something very simmilar, ...
Maverick Meerkat's user avatar