A researcher used postal ZIP Codes to divide the state into regions. She picked a random...
A researcher used postal ZIP Codes to divide the state into regions. She picked a random sample of 10 ZIP Code areas and then included all the businesses in each selected ZIP Code area. What type of sampling is this?
Homework Answers
Cluster Sampling
In cluster sampling, the population is divided into clusters and then some clusters are randomly selected. The all individuals in the clusters selected to form the sample. This kind of selection method is called cluster sampling. Here, each ZIP code is a cluster and businesses in the selected ZIP codes form the sample.
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