Stratified Sampling Method Example
In statistics sampling comes in two forms probability sampling and non probability sampling.
Stratified sampling method example. Proportionate allocation uses a sampling fraction in each of the strata that is proportional to that of the total population. Nonprobability sampling is any sampling method where some elements of the population have no chance of selection these are sometimes referred to as out of coverage. Sampling theory chapter 4 stratified sampling shalabh iit kanpur page 2 now draw the samples by srs from each of the strata 1 2 3 and 4. See the function strata from the package sampling.
The function selects stratified simple random sampling and gives a sample as a result. Extra two columns are added. A probability sampling method is any method of sampling that utilizes some form of random selection. In order to have a random selection method you must set up some.
It is incumbent on the researcher to clearly define the target population. There are no strict rules to follow and the researcher must rely on logic and. 1 paper 058 2009 selecting a stratified sample with proc surveyselect diana suhr university of northern colorado abstract stratified random sampling is simple and.