Questions tagged [chunk-test]
4 questions
16
votes
2 answers
What are chunk tests?
In answer to a question on model selection in the presence of multicollinearity, Frank Harrell suggested:
Put all variables in the model but do not test for the effect of one
variable adjusted for the effects of competing variables... Chunk
tests…
fmark
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3
votes
2 answers
If I have one non-significant factor level in a glm, is that entire variable now considered non significant?
I have a question similar to this one, but I just wanted to follow on and ask if the entire variable is now insignificant? I have a factor with 3 levels. When doing the model simplification, it showed that two of the levels were significant, and one…
trizzo
- 31
- 1
2
votes
1 answer
how can I obtain a beta value for three way interaction term in a logistic regression
I am using the RMS package in R to conduct a logistic regression that contains a three-way interaction. As part of my modelling approach, I have conducted chunk tests of the interaction (using Wald chi-square) followed by odds ratios for significant…
user183974
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0
votes
2 answers
P-values for spline terms in coxph in R
I have a Cox PH model including a smoothing spline as follows, where x and z are covariates:
fit<-coxph(Surv(start,end,exit) ~ x + pspline(z))
While I understand that getting a single coefficient to summarise a spline term is not meaningful and,…
Conor Little
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