Most American college students make use of the Internet for both academic and social purposes. What proportion of students use it for more than 3 hours a day? The authors of the paper “ U. S. College Students’ Internet Use: Race, Gender and Digital Divides” ( Journal of Computer- Mediated Communication [ 2009]: 244– 264) describe a survey of 7,421 students at 40 colleges and universities. The sample was selected to reflect general demographics of U. S. college students. Of the students surveyed, 2,998 reported Internet use of more than 3 hours per day. Copyright 2012 Cengage Learning. All Rights
a. Use the given information to estimate the proportion of college students who use the Internet more than 3 hours per day.
b. Verify that the conditions needed in order for the margin of error formula to be appropriate are met.
c. Compute the margin of error.
d. Interpret the margin of error in the context of this problem.