Chapter 1, Problem 11SE

Driverless Cars Expected Soon. A Gallup 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 (Gallup,

FIGURE 1.7 Histogram of Survey Results on Driverless Cars

https://news.gallup.com/poll/234152/americans-expect-driverless-cars-common-next-decade.aspx). The question asked was:

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]?

Figure 1.7 shows a summary of results of the survey in a histogram indicating the percentage of the total responses in different time intervals.

1. a. Are the responses to the survey question quantitative or categorical?
2. b. How many of the respondents said that they expect driverless cars to be common in the next 10 years?
3. c. How many respondents answered in the range 16–20 years?