survey (version 2.4)

fpc: Small survey example

Description

The fpc data frame has 8 rows and 6 columns. It is artificial data to illustrate survey sampling estimators.

Usage

data(fpc)

source

http://www.stata-press.com/data/r7/fpc.dta

Examples

data(fpc)
fpc


withoutfpc<-svydesign(weights=~weight, ids=~psuid, strata=~stratid, variables=~x, data=fpc, nest=TRUE)

withoutfpc
svymean(~x, withoutfpc)

withfpc<-svydesign(weights=~weight, ids=~psuid, strata=~stratid,
fpc=~Nh, variables=~x, data=fpc, nest=TRUE)

withfpc
svymean(~x, withfpc)

## Other equivalent forms 
withfpc<-svydesign(prob=~I(1/weight), ids=~psuid, strata=~stratid,
fpc=~Nh, variables=~x, data=fpc, nest=TRUE)

svymean(~x, withfpc)

withfpc<-svydesign(weights=~weight, ids=~psuid, strata=~stratid,
fpc=~I(nh/Nh), variables=~x, data=fpc, nest=TRUE)

svymean(~x, withfpc)

withfpc<-svydesign(weights=~weight, ids=~interaction(stratid,psuid), strata=~stratid,
fpc=~I(nh/Nh), variables=~x, data=fpc)

svymean(~x, withfpc)

fpctbl<-data.frame(strata=c(1,2), sizes=c(15,12))

withfpc<-svydesign(weights=~weight, ids=~psuid, strata=~stratid, fpc=fpctbl, variables=~x, data=fpc, nest=TRUE)

svymean(~x, withfpc)