# svyttest

From survey v3.37
by Thomas Lumley

##### Design-based t-test

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`

##### See Also

##### Examples

```
# NOT RUN {
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)
# }
```

*Documentation reproduced from package survey, version 3.37, License: GPL-2 | GPL-3*

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