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. 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. 

a. Are the responses to the survey question quantitative or categorical? 

b. How many of the respondents said that they expect driverless cars to be common in the next 10 years? 

c. How many respondents answered in the range 16–20 years? 

Transcribed Image Text:

FIGURE 1.7 Histogram of Survey Results on Driverless Cars 40 35 30 25 20 15 10 Within 5 years 6-10 years 11-15 years 16-20 years Don't know Time Percentage of Responses Longer than that