The American Press Institute reports that almost 70% of all American adults use a computer to gain access to news. Suppose you suspect that the proportion of American adults under 30 years old who use a computer to gain access to news exceeds the proportion of Americans at least 30 years old who use a computer to gain access to news. Data in the file ComputerNews represent responses to the question "Do you use a computer to gain access to news?" given by random samples of American adults under 30 years old and Americans who are at least 30 years old.
a. Estimate the proportion of American adults under 30 years old who use a computer to gain access to news and the proportion of Americans at least 30 years old who use a computer to gain access to news.
b. Provide a 95% confidence interval for the difference in these proportions.
c. O n the basis of your findings, does it appear the proportion of American adults under 30 years old who use a computer to gain access to news exceeds the proportion of Americans who are at least 30 years old that use a computer to gain access to news?