Two-stage cluster sampling Two-stage cluster sampling, a simple case of multistage sampling, is obtained by selecting cluster samples in the first stage and then selecting a sample of elements from every sampled cluster. Consider a population of N clusters in total. In the first stage, n clusters are selected using the ordinary cluster sampling method. In the second stage, simple random sampling is usually used. It is used separately in every cluster and the numbers of elements selected from different clusters are not necessarily equal. The total number of clusters N, the number of clusters selected n, and the numbers of elements from selected clusters need to be pre-determined by the survey designer. Two-stage cluster sampling aims at minimizing survey costs and at the same time controlling the uncertainty related to estimates of interest. This method can be used in health and social sciences. For instance, researchers used two-stage cluster sampling to generate a representative sample of the Iraqi population to conduct mortality surveys. Sampling in this method can be quicker and more reliable than other methods, which is why this method is now used frequently.
Two-stage cluster sampling Two-stage cluster sampling a simple case of multistage sampling is obtained by selecting cluster samples in the first stage and then selecting a sample of elements from every sampled cluster Consider a population of N clusters in total In the first stage n clusters are selected using the ordinary cluster sampling method In the second stage simple random sampling is usually used It is used separately in every cluster and the numbers of elements selected from different clusters are not necessarily equal The total number of clusters N the number of clusters selected n and the numbers of elements from selected clusters need to be pre-determined by the survey designer Two-stage cluster sampling aims at minimizing survey costs and at the same time controlling the uncertainty related to estimates of interest This method can be used in health and social sciences For instance researchers used two-stage cluster sampling to generate a representative sample of the Iraqi population to conduct mortality surveys Sampling in this method can be quicker and more reliable than other methods which is why this method is now used frequently