survey: svyttest – R documentation

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svyttest

Design-based t-test

Description

One-sample or two-sample t-test. This function is a wrapper for svymean in the one-sample case and for svyglm in the two-sample case. Degrees of freedom are degf(design)-1 for the one-sample test and degf(design)-2 for the two-sample case.

Usage

svyttest(formula, design,  ...)

Arguments

`formula`	Formula, `outcome~group` for two-sample, `outcome~0` or `outcome~1` for one-sample
`design`	survey design object
`...`	for methods

Value

Object of class htest

Examples

data(api)
dclus2<-svydesign(id=~dnum+snum, fpc=~fpc1+fpc2, data=apiclus2)
tt<-svyttest(enroll~comp.imp, dclus2)
tt
confint(tt, level=0.9)

svyttest(I(api00-api99)~0, dclus2)

survey

Analysis of Complex Survey Samples

v4.0

GPL-2 | GPL-3

Authors

Thomas Lumley

Initial release