regTermTest {survey} | R Documentation |
Provides a Wald test of the hypothesis that all coefficients
associated with a particular regression term are zero (or have some
other specified values). Particularly useful as a substitute for
anova
when not fitting by maximum likelihood.
regTermTest(model, test.terms, null=NULL,df=Inf)
model |
A model object with coef and vcov methods |
test.terms |
Character string or one-sided formula giving name of term or terms to test |
null |
Null hypothesis values for parameters. Default is zeros |
df |
Denominator degrees of freedom for an F test. If
NULL these are estimated from the model |
An object of class regTermTest
.
data(esoph) model1 <- glm(cbind(ncases, ncontrols) ~ agegp + tobgp * alcgp, data = esoph, family = binomial()) anova(model1) regTermTest(model1,"tobgp") regTermTest(model1,"tobgp:alcgp") regTermTest(model1, ~alcgp+tobgp:alcgp) data(api) dclus2<-svydesign(id=~dnum+snum, weights=~pw, data=apiclus2) model2<-svyglm(api00~ell+meals+mobility, design=dclus2) regTermTest(model2, ~ell) regTermTest(model2, ~ell,df=NULL)