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Saint GBA334 unit 1 quiz

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Question;Question 1.;1.;A production process is;known to produce a particular item in such a way that 5 percent of these;are defective. If two items are randomly selected as they come off the;production line, what is the probability that both are defective;(assuming that they are independent)?;(Points: 4);0.01000.10000.20000.00250.0250;Question 2.;2.;Which distribution is helpful in testing hypotheses about variances?;(Points: 4);binomial distributionF distributionnormal distributionPoisson distributionexponential distribution;Question 3.;3.;At a university with;1,000 business majors, there are 200 business students enrolled in an;introductory statistics course. Of these 200 students, 50 are also;enrolled in an introductory accounting course. There are an additional;250 business students enrolled in accounting but not enrolled in;statistics. If a business student is selected at random, what is the;probability that the student is enrolled in statistics?;(Points: 4);0.050.200.250.30None of the above;Question 4.;4.;The number of cars passing through an intersection in the next five minutes can usually be described by the;(Points: 4);normal distribution.uniform distribution.exponential distribution.Poisson distribution.None of the above;Question 5.;5.;At a university with;1,000 business majors, there are 200 business students enrolled in an;introductory statistics course. Of these 200 students, 50 are also;enrolled in an introductory accounting course. There are an additional;250 business students enrolled in accounting but not enrolled in;statistics. If a business student is selected at random, what is the;probability that the student is either enrolled in accounting or;statistics, but not both?;(Points: 4);0.450.500.400.05None of the above;Question 6.;6.;The number of phone;calls coming into a switchboard in the next five minutes will either be;0, 1, 2, 3, 4, 5, or 6. The probabilities are the same for each of these;(1/7). If X is the number of calls arriving in a five-minute time;period, what is the mean of X?;(Points: 4);2345None of the above;Question 7.;7.;At a university with;1,000 business majors, there are 200 business students enrolled in an;introductory statistics course. Of these 200, 50 are also enrolled in;an introductory accounting course. There are an additional 250 business;students enrolled in accounting but not enrolled in statistics. If a;business student is selected at random, what is the probability that the;student is enrolled in neither accounting nor statistics?;(Points: 4);0.450.500.550.05None of the above;Question 8.;8.;Historical data;indicates that only 20% of cable customers are willing to switch;companies. If a binomial process is assumed, then in a sample of 20;cable customers, what is the probability that no more than 3 customers;would be willing to switch their cable?;(Points: 3);0.850.150.200.4110.589;Question 9.;9.;Suppose that when the;temperature is between 35 and 50 degrees, it has historically rained 40%;of the time. Also, historically, the month of April has had a;temperature between 35 and 50 degrees on 25 days. You have scheduled a;golf tournament for April 12. What is the probability that players will;experience rain and a temperature between 35 and 50 degrees?;(Points: 4);0.3330.4000.8331.0000.480;Question 10.;10.;The ability;to examine the variability of a solution due to changes in the;formulation of a problem is an important part of the analysis of the;results. This type of analysis is called ________ analysis.;(Points: 4);implicitnormalscaleobjectivesensitivity;Question 11.;11.;Properties of the normal distribution include;(Points: 4);a continuous bell-shaped distribution.a discrete probability distribution.the number of trials is known and is either 1, 2, 3, 4, 5, etc.the random variable can assume only a finite or limited set of values.use in queuing.;Question 12.;12.;The number of cell phone;minutes used by high school seniors follows a normal distribution with a;mean of 500 and a standard deviation of 50. What is the probability;that a student uses fewer than 600 minutes?;(Points: 4);00.0230.8410.977None of the above;Question 13.;13.;At a university with;1,000 business majors, there are 200 business students enrolled in an;introductory statistics course. Of these 200 students, 50 are also;enrolled in an introductory accounting course. There are an additional;250 business students enrolled in accounting but not enrolled in;statistics. If a business student is selected at random, what is the;probability that the student is enrolled in both statistics and;accounting?;(Points: 4);0.050.060.200.25None of the above;Question 14.;14.;At a university with;1,000 business majors, there are 200 business students enrolled in an;introductory statistics course. Of these 200 students, 50 are also;enrolled in an introductory accounting course. There are an additional;250 business students enrolled in accounting but not enrolled in;statistics. If a business student is selected at random and found to be;enrolled in statistics, what is the probability that the student is;also enrolled in accounting?;(Points: 4);0.050.300.200.25None of the above;Question 15.;15.;A ________ is a numerical statement about the likelihood that an event will occur.;(Points: 4);mutually exclusive constructcollectively exhaustive constructvarianceprobabilitystandard deviation;Question 16.;16.;The classical method of determining probability is;(Points: 4);subjective probability.marginal probability.objective probability.joint probability.conditional probability.;Question 17.;17.;Trying various approaches and picking the one that results in the best decision is called;(Points: 4);the trial-and-error method.incomplete enumeration.complete enumeration.algorithmic approximation.sensitivity analysis.;Question 18.;18.;A(n) ________ is a representation of reality or a real-life situation.;(Points: 4);objectivemodelanalysisalgorithmNone of the above;Question 19.;19.;At a university with;1,000 business majors, there are 200 business students enrolled in an;introductory statistics course. Of these 200, 50 are also enrolled in;an introductory accounting course. There are an additional 250 business;students enrolled in accounting but not enrolled in statistics. If a;business student is selected at random, what is the probability that the;student is not enrolled in statistics?;(Points: 4);0.050.200.250.80None of the above;Question 20.;20.;Drivers arrive at a toll;booth at a rate of 3 per minute during peak traffic periods. The time;between consecutive driver arrivals follows an exponential distribution.;What is the probability that takes less than 1/2 of a minute between;consecutive drivers?;(Points: 4);0.1670.2230.7770.51;Question 21.;21.;Suppose that 10 golfers;enter a tournament and that their respective skill levels are;approximately the same. Six of the entrants are female and two of those;are older than 40 years old. Three of the men are older than 40 years;old. What is the probability that the winner will be a female who is;older than 40 years old?;(Points: 4);0.0001.1000.1980.2000.900;Question 22.;22.;Postoptimality analysis is most closely associated with;(Points: 4);collecting input data.developing a model.sensitivity analysis.writing a computer program.None of the above;Question 23.;23.;The break-even point is an example of a;(Points: 4);postoptimality model.quantitative analysis model.schematic model.sensitivity analysis model.None of the above;Question 24.;24.;Testing the data and model should be done before the results have been analyzed.;(Points: 4);True False;Question 25.;25.;Which of the following statement(s) are true regarding the advantages of mathematical modeling?;(Points: 4);Models accurately represent reality.Models can help decision makers formulate problems.Models can save time.Models may be the only way to solve some large and complex problems in a timely manner.All of the above

 

Paper#60441 | Written in 18-Jul-2015

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