Answer:
good
"Eighty-nine percent of Americans like to eat hamburgers.
seventy-five percent of commuters are too busy to answer poll questions.
"Only 33 percent of those visiting the public library come to borrow books
Only two percent of Americans know whom Britney Spears married."
bad
poll taken of 300 people outside McDonald's at lunchtime
poll taken of 500 people in front of the train station during rush hour
poll taken of 65 residents at the Shady Rest Retirement Home
poll taken of 1,000 people using the Philadelphia Free Library over a period of three weeks, at different times of day