A councilman who is running for the office of senator of a state with 3.5 million registered voters commissions a survey.In the survey,46% of the 8,000 registered voters interviewed say they plan to vote for him.The population of interest is:

A) the 3.5 million registered voters in the state.
B) the 8,000 registered voters interviewed.
C) the 46% who plan to vote for her.
D) all the residents of the state.

The population of interest is the entire group of 3.5 million registered voters in the state, as the councilman is running for senator of the state and needs to know the voting intentions of the entire population, not just those who were surveyed. The 8,000 registered voters interviewed and the 46% who plan to vote for him are both samples within the larger population. All the residents of the state is too broad of a population as not all residents are registered voters.