13. In a survey about the safety of air travel, 69% of the 1044 surveyed from the United States said that they consider air travel to be safe.

a) Define p and pfor this problem. Which is the one that we will estimate a confidence interval? Which is the one that we know from the survey and what is it?

b) Find a 95% confidence interval for the population proportion of people that think U.S. air travel is safe.

c) From this survey, can we be 95% confident that the majority of people think that U.S. air travel is safe?