The study “Digital Footprints” ( Pew Internet & American Life Project, www. pewinternet. org, 2007) reported that 47% of Internet users have searched for information about themselves online. The 47% figure was based on a representative sample of Internet users. Suppose that the sample size was n 5 300 ( the actual sample size was much larger).
a. Use the given information to estimate the proportion of Internet users who have searched for information about themselves online. What statistic did you use?
b. Use the sample data to estimate the standard error of ˆ p .
c. Compute and interpret the margin of error associated with the estimate in Part (a).