finite.sample.size: Calculates the number of samples of given size that can be...

In david-borchers/sampling: Module MT4608 Sampling Theory Practical Package

Calculates the number of samples of given size that can be taken without replacement.

Description

This function calculates the number of samples of size n than can be taken from a population of size N without replacement. Does this for simple random, stratified or cluster sampling..

Usage

                   finite.sample.size(dat,n=NULL,m=NULL)

Arguments

dat	Data frame containing the population to be sampled (one element per row).
n	Sample size. If a vector, it must he the same length as the number of strata (levels of the column called "subunit" in dat) and its elements are the sample sizes in each stratum. Only one of 'n' and 'm' should be specified.
m	Number of clusters to be sampled in cluster sampling. Only one of 'n' and 'm' should be specified.

Details

Calculates the number of possible samples that can be taken. In the case of stratified sampling, this is the product of the number that can be taken in each stratum.

Value

The function prints the number of possible samples.

See Also

define.subunit

Examples

                   data(st03) # get 2003 Sampling Theory class data
                   data(worms) # get worms data
                   
                   # srs:
                   finite.sample.size(st03,4)
                   finite.sample.size(worms,4)
                   
                   # Stratified random samples:
                   # Define strata based on year of study:
                   strat.st03<-define.subunit(st03,aux.name="yr.study",type="strat")
                   finite.sample.size(strat.st03,n=c(3,3,1))
                   
                   # Cluster samples:
                   # Define strata based on year of study:
                   clust.st03<-define.subunit(st03,aux.name="yr.study",type="clust")
                   finite.sample.size(clust.st03,m=2)
                   
                   

david-borchers/sampling documentation built on Sept. 17, 2022, 7:54 a.m.