A Public Opinion Poll in Ohio Was Set Up to Determine

Multiple Choice

A public opinion poll in Ohio was set up to determine whether registered voters in the state approved of a measure to ban smoking in all public areas. The researchers selected a simple random sample of 50 registered voters from each county in the state and asked whether the voters approved or disapproved of the measure. This is an example of:

A) a systematic county sample.
B) a stratified sample.
C) a multistage sample.
D) a simple random sample.