In May of 2013, the Pew Research Center’s Internet and American Life Project conducted a survey with a random sample of American adults. Of the 1,895 Internet users in the sample, 72% reported that they used social networking sites.
a. Identify the population of interest for this study.
b. Identify the parameter of interest.
c. Determine a 95% confidence interval for the parameter.
d. Interpret what this confidence interval says.
e. Based on the confidence interval, does the sample result provide strong evidence against believing that 75% of all American adult Internet users in May of 2013 used social networking sites? Explain how your conclusion follows from the confidence interval.