[R] 4 questions regarding hypothesis testing, survey package, ts on samples, plotting

James Reilly reilly at stat.auckland.ac.nz
Wed Dec 19 10:50:00 CET 2007

On 19/12/07 8:39 PM, eugen pircalabelu wrote:
> 2. How can i find the median of a variable in survey package?
> a<-c(1:10)
> b<-sample(1:20, 10, replace=T)
> b1<-sample(0:1, 10, replace=T)
> c<-data.frame(a,b, b1)
> library(survey)
> design<-svydesign(id=~1, data=c)
> svymean(~b, design)
> svymean gives me the mean, but what function gives me the svymedian, and what function gives me the svyproportion  for b1? 
> I want to know the median for a metric variable and the proportion for a binomial variable ?

The svyquantile function will give you the median, e.g.
svyquantile(~b, design, 0.5, interval.type="score")

Since a proportion is just the mean of a 0/1 variable, you can use 
svymean for that, e.g.
svymean(~b1, design)

James Reilly
Department of Statistics, University of Auckland
Private Bag 92019, Auckland, New Zealand

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