A Travel Weekly International Air Transport Association survey asked business travelers about the
purpose for their most recent business trip. 19% responded that it was for an internal company visit.
Suppose 950 business travelers are randomly selected.
a. What is the probability that more than 20% of the business travelers say that the reason for
their most recent business trip was an internal company visit?
b. What is the probability that between 18% and 20% of the business travelers say that the
reason for their most recent business trip was an internal company visit?