This statistical applet demonstrates five basic probability sampling techniques for a population of size 1000 that comprises two subpopulations separated by a river.
Please note that you need Java installed to use this applet. Download Java for free at www.java.com.
Concept design: Dr Dave Stewart
Java Developer: Julie Bernal-Melo
The probability sampling techniques illustrated are:
- Simple random sampling
- Systematic random sampling
- Stratified sampling
- Cluster sampling
- Multi-stage sampling: a mixture of stratified and cluster sampling.
To explore a particular sampling technique, select the sample size, n (which can take the values 10, 20, 30 up to 100) and then select from the list of sampling techniques.
The CENSUS button outputs the mean and standard deviation of the whole population.