The article “Facebook Use and Academic Performance Among College Students” (Computers in Human Behavior [2015]: 265–272) estimated that 87% percent of students at a large public university in California who are Facebook users update their status at least two times a day. This estimate was based on a random sample of size 261. Assume that this sample is representative of the students at this university.

a. Does this sample provide convincing evidence  that more than 80% of the students at this college who are Facebook users update their status at least two times a day? Test the relevant hypotheses using α = 0.05.

b. Would it be reasonable to generalize the conclusion from the test in Part (a) to all college students in the United States? Explain why or why not.