A public opinion poll in Ohio wants to determine whether registered voters in the state approve of a measure to ban smoking in all public areas. They randomly select 50 voters in the state and ask whether they approve or disapprove of the measure.
This is an example of


At a party there are 30 students over age 21 and 20 students under age 21. You randomly select 5 students to interview about attitudes toward alcohol.
This is an example of


The Ministry of Health in the Canadian Province of Ontario conducted the Ontario Health Survey by conducting interviews with 65,000 randomly selected residents of Ontario.
This is an example of


You can earn partial credit on this problem.