The city council wants to examine their citizens' feelings about allowing dogs on the city's beaches. they construct a list of all the blocks in the city and randomly select 20% of the blocks to sample. they then survey all residnts of the selected city blocks. this sampling strategy is an example of sampling technique.

Cluster sampling

Explanation:

Cluster sampling is the sampling that has been used in the statistics. It is a natural sampling. This sampling has been done on the population that is naturally presented in the population. The population has been divided into clusters and groups then it has been done the random sample from the groups. This sampling method has been used especially in marketing. This sampling method has been used when a researcher does not get information about the whole population.  

It has two types: