Different age groups use different media sources for news.A study on this issue explored the use of cell phones for accessing news. The study reported that 47% of users under age 50 and 15% of users age 50 and over accessed news on their cell phones. Suppose that the survey consisted of 1000 users under age 50, of whom 470 accessed news on their cell phones, and 891 users age 50 and over, of whom 134 access news on their cell phones.

Use a 2 proportion z test to determine if there is a difference in the proportion that accessed the news on their cell phones between users under age 50 and users 50 years and older.

Then construct a 95% confidence interval estimate for the difference between the population proportion of users under 50 year old and those 50 years or older who access the news on their cell phones.