The state of Ohio wants to determine if the common core stan

The state of Ohio wants to determine if the common core standards in K-1 education should be repealed. The state randomly selects 10 zip codes and then surveys all of the residents living in each of those zip codes. What type of sample was described here?

Solution

This is a cluster sampling. In cluster sampling the population is divided into seperate groups( called clusters). The sample which is described here is a cluster.