Many large cities have considered or passed proposals that ban the use of plastic grocery bags in stores. A concerned student would like to measure if residents of her hometown would consider a similar ban on plastic bags.
Standing in a busy shopping area, the student approaches adults and asks, "Items made of plastics are a
dangerous, growing source of pollution to our world's oceans and threaten many animal species. Given this, would
you support a ban on plastic shopping bags in our city stores?" How might the results of this survey be biased in
estimating the proportion of all town residents who would support a ban on plastic bags?
O The student may overestimate support for a plastic bag ban because only adults in the shopping area were
chosen to participate.
O The student may overestimate support for a plastic bag ban because the wording of the question may influence
adults to support a ban.
O The student may underestimate support for a plastic bag ban because the wording of the question may influence
adults to not support a ban.
O The student may underestimate support for a plastic bag ban because some adults may not want to answer
questions about the environment.