55. An airline promotion to business travelers is based on the assumption that two-thirds of business travelers use a laptop computer on overnight business trips.

a. State the hypotheses that can be used to test the assumption.

b. What is the sample proportion from an American Express–sponsored survey that found 355 of 546 business travelers use a laptop computer on overnight business trips?

c. What is the p-value?

d. Use α  .05. What is your conclusion?