MATH 318, Chapter 4 Quiz
You may use a calculator on this quiz. You may not use a cell phone or computer. If you wish partial credit for incorrect answers, please show your work carefully and give justifications for your answers. If you find that you are spending a lot of time on one problem, leave it blank and move on to the next. There are questions on both sides of this quiz paper.
Alpha Airlines is trying to decide whether to launch a new "executive" shuttle service from Boston to Washington,
D.C. or to add more "discount" seats to their current service. They have estimated the following quarterly profits for
the two services; projected profits vary depending on whether demand for air service between these two cities is strong or
weak. Profits listed are in thousands of dollars. (This problem is a modified version of one on page 134 of the text.)
- (20 points) What are the states of nature being considered in the Alpha Airlines decision?
- (20 points) If the airline chooses between executive and discount service using a conservative approach,
which will they choose and why?
- (20 points) What combination of decision alternatives and states of nature lead to the largest (maximum)
regret for Alpha Airlines?
- An independent research firm estimates that the probability of strong demand for flights between Boston
and Washington, D.C. is 70% and the probability of weak demand is 30%.
a) (10 points) Compute the expected values of quarterly profits for the executive and discount services.
b) (10 points) Which decision alternative has the highest expected value?
c) (20 points) Consider the estimated quarterly profits for executive class service with weak demand. What would
the estimated profits need to be in order to change your answer to part (b) of this question? (I.e. calculate
sensitivity to changes in this value.)
Bonus (5 points) Compute the expected value of perfect information (EVPI) for the Alpha Airlines decision.