regTermTest {survey}R Documentation

Wald test for a term in a regression model

Description

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.

Usage

regTermTest(model, test.terms, null=NULL)

Arguments

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

Value

An object of class regTermTest.

See Also

anova, vcov, contrasts

Examples

 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)

[Package survey version 3.0-1 Index]