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Management Science 3
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Questions in this quiz (40)
1An important factor to consider in analyzing a queuing system is the:
- Aqueue discipline.
- Bqueue structure.
- Ccost.
- Dqueue order.
2The arrival rate is the:
- Arate of arrivals to the service facility.
- Btime between arrivals to the service facility.
- Ctime a customer spends in line.
- Drate items arrive at the server after being in queue.
3Cars arrive at a single-bay car wash at an average of 6 per hour according to the Poisson distribution. The wash time averages 4 minutes with a standard deviation of 1 minute, but the wash time is not defined by any distribution. What is the average number of cars in line?
- A.142
- B.283
- C2.83
- D.267
4In a single-server queuing model, L represents the:
- Aaverage number of customers waiting and being served.
- Blength of the line.
- Csize of the queue.
- Dlength of time a customer waits.
5In a finite queue, the length of the queue is:
- Aunlimited.
- Blimited or unlimited.
- Climited and unlimited.
- Dlimited.
6A crew of mechanics at the Department of Transportation garage make minor repairs to snowplows during the winter. The snowplows break down at an average rate of 4 vehicles per day and breakdowns are distributed according to the Poisson distribution. The mechanic can service an average of 7 vehicles per day with a repair time distribution that approximates a negative exponential distribution. Assume an 8 hour day.
- A20 minutes
- B.33 hours
- C.19 days
- D2.64 hours
7Which of the following will not decrease system utilization?
- Aincrease in service rate
- Bdecrease in service time
- Cincrease in the number of servers
- Dincrease in arrival rate
8A single-server waiting line system has an arrival pattern characterized by a Poisson distribution with 3 customers per hour. The average service time is 12 minutes. The service times are distributed according to the negative exponential distribution.
- A.40.
- B.20.
- C.60.
- D0.
9Poultry Processing processes chickens for fast food restaurants. The chickens arrive from the farms on trucks, in cages, at a rate of 8 trucks per hour according to the Poisson distribution. The quality standards of Poultry Processing require that the chickens be processed within 30 minutes, which includes the time from when the trucks arrive until the chickens are finished processing. What is the minimum average processing rate (in truckloads per hour) that must be designed for the machine in order to ensure that the cages will be processed, on the average, in 30 minutes or less? Assume processing time is exponentially distributed.
- A10 trucks per hour
- B9 trucks per hour
- C18 trucks per hour
- D4.5 trucks per hour
10Cars arrive at a single-bay car wash at an average of 6 per hour according to the Poisson distribution. The wash time is a constant 4 minutes. What is the average number of cars in line?
- A.133
- B.667
- C.022
- D.267
11If the probability of an event is 0.36, what random number range specifies this properly?
- A0.30 - 0.40
- B0.10 - 0.20
- C0.20 - 0.30
- D0.40 - 0.50
12What is the 95% confidence interval width for a sample with a mean of 50 and a standard deviation of 14 based on 75 observations?
- A(46.83, 53.17)
- B(44.13, 55.87)
- C(40.67, 59.32)
- D(48.22, 51.78)
13A bakery is considering hiring another clerk to better serve customers. To help with this decision, records were kept to determine how many customers arrived in 10-minute intervals. Based on 100 10-minute intervals, the following probability distribution and random number assignments developed.
Suppose the next three random numbers were .18, .89 and .67. How many customers would have arrived during this 30-minute period?
- A22
- B25
- C23
- D24
14________ is not part of a Monte Carlo simulation.
- AFinding an optimal solution
- BAnalyzing results
- CAnalyzing a real problem
- DEvaluating the results
15Developing the cumulative probability distribution helps to determine:
- Arandom number ranges.
- Bmean of the distribution.
- Cdata sets.
- Dsimulation numbers.
16________ is a technique for selecting numbers randomly from a probability distribution.
- AMonaco
- BMarseille
- CMonte Carlo
- DAnalogue simulation
17A seed value is a(n):
- Asteady state solution of a simulation experiment.
- Banalytic solution of a simulation experiment.
- Cnumber used to start a stream of random numbers.
- Dfirst run of a simulation model.
18
A graduate research assistant "moonlights" at the short order counter in the student union snack bar in the evenings. He is considering asking for help taking orders, but needs to convince the management that they should hire another student. Because he is taking a simulation class, he thinks it may be the perfect way to convince management to hire more help if he can show that customers have to wait a long time. When a customer arrives, he takes their order and their payment, prepares the food, gives it to the customer, and then takes the order from the next person in line. If someone arrives while he's cooking an order, they have to wait until he's completed the current order. He has simulated 5 orders.
Average customer waiting time is:
- A1 minute.
- B3 minutes.
- C2 minutes.
- D2.5 minutes.
19Random numbers generated by a ________ process instead of a ________ process are pseudorandom numbers.
- Amathematical, mathematical
- Bmathematical, physical
- Cphysical, physical
- Dphysical, mathematical
20A limitation of simulation is that:
- Amodel building is costly and time-consuming.
- Bit is more difficult to manipulate the elements of a computer simulation than the actual system.
- Cit is usually possible to realistically validate simulation results.
- Dmodels are typically well-structured and must be developed for problems that are also well-structured.
21Simulation does not usually provide recommended decisions. Instead it provides:
- Aoptimal solutions.
- Boperating characteristics.
- Csystem parameters.
- Drealistic results.
22A table of random numbers must be:
- Ain ascending order.
- Bin descending order.
- Cnormally distributed.
- Defficiently generated.
23Simulations are normally done:
- Aon the computer.
- Bin a casino.
- Cmanually.
- Dby a spreadsheet.
24In the Monte Carlo process, values for a random variable are generated by ________ a probability distribution.
- Aintegrating
- Brunning
- Csampling from
- Dimplementing
25The ________ process is analogous to gambling devices.
- ASimulation
- BMonte Carlo
- CMonaco
- DNone of these
26The ________ is a procedure for developing a consensus forecast about what will occur in the future.
- ADelphi method
- B.
27A ________ is a gradual, long-term, up-or-down movement of demand.
- Atrend
- B.
28A rendering plant wishes to use the data (sales records from a few local businesses and the month of the year) to help determine their supply level for the coming months. The records shown in the table provide an excellent opportunity for you to assist them with their forecasting.
What is the three-period weighted moving average for July using the weights 0.5 (most recent), 0.3, and 0.2?
- A45.6
- B.
29In adjusted exponential smoothing, the closer beta is to ________, the stronger a trend is reflected.
- A1
- B-1
- C0
- D2
30Given the following data on the number of pints of ice cream sold at a local ice cream store for a 6-period time frame:
Use a 2-period moving average to forecast demand for period 7.
- A290
- B.
31A ________ is an up-and-down repetitive movement that repeats itself over a time span of more than 1 year.
- Aseasonal pattern
- B.
32________ use management judgment, expertise, and opinion to make forecasts.
- AQualitative methods
- B.
33________ is a measure of the strength of the relationship between independent variable(s) and a dependent variable.
- ACorrelation
- B.
34Coefficient of determination is the percentage of the variation in the ________ variable that results from the ________ variable.
- Adependent, independent
- Bindependent, independent
- Cdependent, dependent
- Dindependent, dependent
35________ methods assume that what has occurred in the past will continue to occur in the future.
- ATime series
- B.
36________ is the percentage of the variation in the dependent variable that results from the independent variable.
- ACoefficient of determination
- B.
37________ indicates a forecast is biased high.
- ALarge - E
- BLarge + E
- CLarge * E
- DLarge / E
38________ moving averages react more slowly to recent demand changes than do ________ moving averages.
- ALonger-period, shorter-period
- BLonger-period, longer-period
- CShorter-period, shorter-period
- DShorter-period, longer-period
39________ is absolute error as a percentage of demand.
- AMAPD
- B.
40The following data represents quarterly sales of lawnmowers.
What is the seasonal index for the fourth quarter? (Round to the nearest hundredth.)
- A.25
- B.30
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- Description
- Quiz on Management Science 3, created by Sarah Müller on 25/04/2018.
- Author
- Sarah Müller
- Language
- English
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