Suppose a poll utilizing a random sample of 1,503 adults ages 18 or older was conducted in April 2018. The survey indicated a majority of Americans (53%) say driverless cars will be common in the next 10 years. The following question was asked with possible responses 'Within 5 years', '6–10 years', '11–15 years', '16–20 years', 'Longer than that', 'Don't know': "Thinking about fully automated, 'driverless cars,' cars that use technology to drive and do not need a human driver, based on what you have heard or read, how soon do you think driverless cars will be commonly used in the [United States]?"