Question: Assume that you are responsible for scheduling airplane crews for the many different airports that your company serves. FAA regulations as well as unions are very strict in enforcing the proper crew size. Knowing that crew members from time to time get sick, are delayed flying in to the hub, etc., you need to keep a few extras around at Hub X. You don't want to keep too many, because of the cost, but you are not willing to take more than a 1.5% risk of being short-staffed. Past history tells you that the average number of "absent" crew members per day is 2.35. Assume that the Poisson process applies. How many standby crew members should you keep on duty?