All Questions
Tagged with model-selection model
66
questions
1
vote
1
answer
201
views
Which regression model would you choose?
Which regression model would you choose to model the following flood damage data? The variables are x1=water height, x2=dike height and x3=flood damage. The following plot shows how the flood damages ...
- 11
0
votes
1
answer
25
views
How do I select a KNN model?
I am considering methods of selecting an optimal K Nearest Neighbors model for classifying a pixel as representing a refugee's blue tarp or not. See https://www.kaggle.com/datasets/billbasener/pixel-...
- 121
0
votes
0
answers
32
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Theoretical question about GAM (generalized additive models)
I'm new to GAM so please be patient with me.
This is a theoretical question rather than a coding question.
I have a model as follows:
response variable (y) = insect abundance;
Disturbance type (...
- 1
1
vote
2
answers
739
views
How does the Bayesian Information Criterion work for model selection? [closed]
I am aware that we can use the BIC values from different models in order to determine which model predicts the data best. However, I'm a little confused about the criteria used to determine which ...
- 113
1
vote
1
answer
37
views
Why this regression model with one predictor don't work?
I have this R script. I want to estimate the coefficient of the dependent variable Y based on several regression.
...
- 13
2
votes
1
answer
100
views
Why model order selection is a big problem in statistics?
I’m learning statistical signal processing for my studies. I was doing a bit of literature review on model order selection and I didn’t want to miss out on techniques that I might not have seen. I ...
- 235
1
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0
answers
22
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Does changing model due to overdispersion/underdispersion results in forking?
This is related to the post How much do we know about p-hacking "in the wild"?. The post does not clearly delineate the boundary between forking or not forking to me.
Suppose I have a count ...
- 1,445
19
votes
3
answers
2k
views
Widespread overfitting in health domain research?
I was reading about flaws with model selection techniques such as elimination based on significance and backwards selection via AIC (or similar) in the context of regression leading to inflated ...
- 409
4
votes
1
answer
105
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Is it possible that GEE and mixed effect GLM give contradicting answers? If so, which one should be trusted?
Is it possible that GEE and mixed effect GLM give contradictive answers in significance of covariates? I assume both GEE and GLM selects same covariates. If so, which one should be trusted?
From ...
- 1,445
0
votes
0
answers
70
views
Best approach for AIC model selection?
I am doing a study where I am trying to model how different factors affect polar bear movement. I would like to conduct model selection using AIC. So far, I believe I have two options:
1) Put ...
- 151
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votes
0
answers
19
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model to explore correlation of pollution long-term exposure with genetic mutation rates
I have pollution data of several US cities, as example NY, Boston, and Chicago.
I need to ...
- 229
1
vote
0
answers
51
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Why does the best fit model (lower AIC) yield higher p values than models with higher AIC? [closed]
Background: I am running a model selection in R that includes 1, 2, and 3-covariate models. Each model aims to determine the effect of environmental covariates in the occupancy of different species in ...
- 11
3
votes
1
answer
82
views
Can I use AIC for path models and non-path models?
I am testing competing hypotheses where one hypothesis contains a mediation effects that can be modeled using a path model. The other hypothesis does not include a mediation effect and therefore can ...
- 354
0
votes
1
answer
157
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ANOVA for comparing same linear models
I have trained two linear regressor models with the same response $Y$ and the same features $x_1$ and $x_2$, they are basically the same model, however only the training data differs: in model1 data ...
2
votes
1
answer
120
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Which choice model to analyse my binary stated choice experiment data to estimate willingess-to-pay?
I followed the recipe of a stated-choice experiment in political science https://doi.org/10.1093/pan/mpt024 (they call it "conjoint" but I think this term is debated).
In the end I made the ...
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