All Questions
Tagged with likelihood-ratio logistic
33
questions
1
vote
1
answer
90
views
One sided likelihood ratio test for a logistic regression model?
I need to run a one-sided test on one parameter of a logistic regression model:
$H_0$: $\beta = 0$
$H_1$: $\beta \geq 0$
I want to avoid Wald-equivalent methods as these are known to have problems ...
- 939
0
votes
1
answer
44
views
How do I quantify the effect of a factor with many levels?
I want to look at the effect of brood ID on fledging success (a binary variable) in a sample of wild birds. Brood ID has ~150 levels.
I have performed a likelihood ratio test comparing two logistic ...
- 1
5
votes
1
answer
269
views
How to use the Likelihood Ratio Test and Wald Statistic when also using Cross Validation?
I am currently writing a paper for uni and stumbled across the following problem:
I want to use the 10 Fold Cross Validation method to validate the results of a logistic regression, but I am unsure ...
- 53
0
votes
0
answers
39
views
Assumptions in logistic regression for applying LRT and AIC criteria
I have a question. Do the following assumptions in logistic regression
Linearity between the log-odds and the continuous covariates
Non multicollinearity
Absence of outliers
need to be satisfied ...
0
votes
1
answer
118
views
Testing independence and setting constraint matrices in a multinomial logit model in R
I have a data set the looks like this (called rand_df as this is a random subset from the much larger dataframe):
...
- 115
1
vote
1
answer
888
views
Adding covariates in chi-squared test or proportions test?
I am having trouble figuring out what analysis is appropriate for my research question. I've been googling for the past few days but couldn't find the answer. I would greatly appreciate it if anyone ...
user334920
1
vote
1
answer
2k
views
Significant coefficients but non-significant likelihood ratio test [closed]
Following a comment on this thread, I have a question about interpreting a logistic regression model with significant coefficients, but non significant likelihood ratio test.
I have a super simple ...
- 111
2
votes
1
answer
1k
views
Should you still report or interpret odds ratios on levels of a factor if the likelihood ratio test is not significant?
I am running a logistic regression to study the association between a three-level factor and a binary outcome, after controlling for covariates. My sample is small to medium (~800). The likelihood ...
- 335
3
votes
2
answers
808
views
Which statistical test to compare same model with different parameters?
I have two datasets on people buying apples based on weight and price. One dataset in 2019 the other in 2020.
I estimate a logit model with Utility = betaWeight * weight + betaPrice * price.
Training ...
- 31
15
votes
3
answers
4k
views
Why use the Wald test in logistic regression?
Some statistical software use the Wald statistic when reporting on the regression coefficients. As examples, R and Stata report Wald by default.
The logistic regression article on Wikipedia says, ...
- 679
1
vote
0
answers
751
views
How to calculate confidence intervals for logistic regression predictions? How does `statsmodels` do it in `summary_frame`?
I am fitting a logistic regression in Python's statsmodels and want a confidence interval for the predicted probabilities. This has been easy to get using ...
- 65k
7
votes
1
answer
2k
views
LRT comparing a random effects model and nested logistic regression model
I have a logistic regression model of the structure y ~ x1 + x2, and a generalized linear mixed model (GLMM) with random intercept and random slope, of the ...
- 725
1
vote
1
answer
927
views
"scale" in logistic regression
I am working on translating some R code into Python's statsmodels package, chiefly some logistic regression work that I've done, when I came across the following in ...
- 65k
2
votes
1
answer
216
views
likelihood ratio test for logistic regression with a complete separation
Can likelihood ratio test be used for logistic regression in the case of complete separation? I understand that individual parameters can go to infinity so Wald's test is not recommended, but does ...
- 7,709
2
votes
0
answers
741
views
Comparing LM, LR and Wald Test in Logistic regression model
I want to test omitted variables and I perform 3 tests: $Wald$, Likelihood Ratio ($LR$) and Lagrange Multiplier ($LM$) test. My model is a linear model with a polynomial element ($x^2$).
I found a ...
- 21