question 21

A state politician is interested in the public opinion regarding a statewide gas tax increas able energy sources. They decide that for al the counties, they will randomly sample 9 voting precincts in each county, and sample all the registered voters in those precincts. (Assume that every voter in each of the G precincts responds to the poll) This is an example of: Select one: O a. Cluster random sample, 0 Ob Surstifled random sample, 0 O a Multi-stage random sample, O O d. Systematic random sample. 0 O e. Simple random sample, 0