Due dates for exams can be extended, but the student must notify instructor to extend exam period

Consider a service system with two servers with waiting space enough for one customer at any given time. In other words, there are at most three customers in the system and any excess customers are turned away. Suppose the interarrival time between customers follows the exponential distribution with rate 1, and the service time distribution of each server follows the exponential distribution with rate 0.4. Answer Q13-Q19 below.

For each of the following, write down a queueing model using Kendall’s representation that best represents the system description. Assume exponential service times and Poisson arrivals.  (a) At a festival, there is a hot dog stand with one server taking orders. The waiting space is virtually unlimited. [mm1] (b) A bank has a four tellers to work on identical tasks; the arriving customers are given printed numbers in order and join whichever teller that becomes available in the incoming order. Due to the capacity limit, it can accommodate up to 30 customers within the space. [mm1k] (c) There is a cash bar at a private event with two bartenders who can take orders in parallel. The event holds 25 guests where each decides that they need a new drink every half an hour. [mm1kk]

According to the Bureau of Justice Statistics’ National Crime Victimization Survey in 2015, approximately _____________ criminal victimizations occurred.

Which of the following approaches may be a more productive way of resolving the issues of school violence and weapons?

Due to a recent increase of school shootings, one high school principal has decided to enlist a profiler to attempt to determine which students are at risk to commit a school shooting. The profiler provides the principal with a list of students said to be at risk. Which of the following is a potential problem with this procedure?

You are witnessing a trial. The judge is doing most of the questioning of witnesses, rather than the lawyers. In fact, the court—not the lawyers—has chosen which witnesses will testify. Where are you?

Which of the following was mentioned as an approach professionals have taken in an effort to curb school shootings?

In a threat assessment, one must consider

Side effects of steroids are