Midwest University has a new policy stating that all incoming freshman must purchase a laptop computer through the university's computer store. In order to forecast sales of laptops computers at Midwest University, which would be the most helpful?
a. A mail survey of incoming freshmen
b. The number of high school seniors who have said they are coming to Midwest University
c. Traffic counts outside the computer store
d. A focus group of parents of high school seniors
Answer: b. The number of high school seniors who have said they are coming to Midwest University