An immigration officer at Heathrow Airport in London can on

An immigration officer at Heathrow Airport in London can on the average process (serve) 15 arriving passengers every hour. If on the average 12 passengers arrive per hour at her station, then: The probability that an arriving passenger will have to wait for this immigration officer is 1.00 or 100% 0.80 or 80% 0.75 or 75% 0.20 or 20% The average number of entrants (passengers) in line waiting for the immigration officer is 12 9 4 3.2 0.067 On average, the amount of time, in minutes, spent by a passenger in the entire immigration system, waiting and being processed, would be 0.333 minutes 20 minutes 16 minutes 0.80 minutes The probability that there are 4 or more people in the system. 0.6836 0.4096 0.2667 0.0791 The probability that the time spent waiting in line will exceed 20 minutes. 0.1015 0.2943 0.3679 0.7627 Which one of the following statements concerning the psychology of waiting lines is NOT generally true? Occupied wait times feel shorter than unoccupied wait times The more valuable the service the longer the customer will wait Solo waits feel longer than group waits. Explained waits seem longer than unexplained waits.

Solution

1.D 0.20 or 20%

2.D.0.067

3.B.20 minutes

4.B 0.4096

5.C.0.3679

6.D.Explained waits seem longer than unexplained waits.