2024 WGU C207 Data Driven Decision Making Practice Exam With Answers (84 Solved Questions)

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(Quiz1)1.Forcompaniestoattractandretaintheirbestcustomerstheyneedacomplete portrait of who they are. To develop this portrait companies turn to...A)StatisticsB)AnalyticsC)ManagementScienceD)HistogramsB(Quiz 1) 2. A manufacturer wants to maximize their factory output while specificallyminimizinglaborcosts.Whattypeofanalyticsmighttheyemploytoachievethisgoal?A)DescriptiveAnalyticsB)PredictiveAnalyticsC)PrescriptiveAnalyticsD)DiagnosticAnalyticsC(Quiz1)3.Whattypeofdataerrorthatoccursinmeasurementisconstantwithinadata set and is sometimes caused by faulty equipment or bias?A)RandomB)OmissionC)OutlierD)SystematicD(Quiz 1) 4. An Educatordevelops a new standardized test to measure math skills ofninthgraders.Shehasstudentsinherhomestateof Ohiotakethetest.Ifthetestistobe used on a national level, what type of error might be found in her data?A)OmissionErrorB)SystematicErrorC)MeasurementBiasD)InformationBiasC(Quiz 1) 5. A city government is trying to determine the national origins of its recentimmigrantpopulation.IfasurveyoftheimmigrantpopulationisconductedinEnglishwhat type of error might be present inthe data?A)RandomB)OmissionC)OutlierD)AccuracyWGUC207DataDrivenDecisionMakingUPDATED 2024 | RATED A+

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B(Quiz1)6.TheuseofBigDataisincreasinglyimportanttobusinessesincompetitivemarkets. Which of the following characteristics is NOT true of big data?A)RequirestheuseofanalyticsB)ContainsstructureddataC)ContainsunstructureddataD)CanbeanalyzedwithtraditionalspreadsheetsD(Quiz 1) 7. The Davenport-Kim three-stage model consists of framing the problem,solvingtheproblem,andcommunicatingresults.Which twoofthefollowingarepartofframing the problem stage?A)DeterminethescopeoftheproblemB)DatacollectionC)Reviewof previousfindingsD)PresentingarecommendationA & C(Quiz 1) 8. A healthcare provider is researching blood glucose levels before and afterexercising.Whattwoelementsshouldbepartof anyexperimentalstudysuchasthis?A)TreatmentproceduresB)PatientobservationC)StatisticalvalidityD)ExperimentalresponseA & D(Quiz1)9.Runnerscover26.2milesintheOlympicsmarathon.Whatlevelofmeasurement is this?A)NominalB)OrdinalC)IntervalD)RatioD(Quiz1)10.Whatlevelofmeasurementisthetypeof carsproducedinFordfactory?A)NominalB)OrdinalC)IntervalD)RatioA(Quiz1)11.Whatlevelofmeasurementisthisthe10bestcitiesintheU.S.toretirein?A)NominalB)OrdinalC)IntervalD)RatioB

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(Quiz1)12.Whatlevelofmeasurementarewomen'sdresssizes(2,4,6,etc.)?A)NominalB)OrdinalC)IntervalD)RatioC(Quiz1)13.Alocalschoolboardisstudyingtheimpactofaproposedchangeintestingon math scores. Bias can beintroduced into the study by both students and teachers.Whichresearchtechniquewouldeliminatethistypeofbias?A)ObservationstudyB)BlindstudyC)CohortstudyD)DoubleblindstudyD(Quiz1)14.ACompany'sproductdevelopmentteamtest3newcarwaxesbywaxing5cars with each wax and then running them through a car wash. They then recordnumberofwashesittakesbeforethewaxbeginstodeteriorate.Whatisthetermforthefive cars?A)TheresponseB)TheconstructvalidityC)TheexperimentalunitD)ThetreatmentC(Quiz2)1.AnonlineretailersellingworkoutapparelhasalargeincreaseinsalesduringDecember and declares that their weekly newspaper ad resulted in higher sales. Whatmisuse of statistics may the retailer have used in making thisdecision?A)ConsciousBiasB)MissingDataC)AssociationandCausationD)SmallSampleSizeC(Quiz2)2.Aneducatorcollectseighth grademathscoresfrom a localschoolandusedthisdatatorecommendcurriculumchangesforgrades8-12.Whatmisuseofstatisticsmay the educator have used in making this recommendation?A)NotarepresentativesampleB)ConsciousBiasC)LackofBindingD)MissingDataA(Quiz 2) 3. An economist wishes to study the distribution of household income in aMidwesterncity.Herandomlyselectsasamplefrom12households.Henoticestwo

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largeincomesinhissample.Whichmeasurebestrepresentsthemiddleoftheincomes?A)ModeB)MedianC)VarianceD)MeanB(Quiz2)4.Acablecompanyoffersitscustomersbothcable televisionandinternet.Whatstatistical rule shouldbe usedto determine the probabilitythatcustomers willhave both cable television and internet?A)MultiplicationB)BayesTheoremC)CombinationD)AdditionA(Quiz 2) 5. A department store is considering a new credit policyto reduce defaults onpayments. Its records show that 95% of defaults have at least 2 late payments. Also,3%ofallcustomersdefaultand30%ofthosecustomerswhohavenotdefaultedhavealeast 2 late payments. What statistical rule should be used tofind the probability that acustomer will default given that at least 2 payments were late?A)CentralLimitTheoremB)MultiplicationRuleC)BayesTheoremD)CombinationRuleC(Quiz2) 6. Based on qualitychecks atplasticbags manufacturer,the breakingstrengthof their bags has a mean of 50.5 and a standard deviation of 1.6. A customer's test ofthebagsfindsbagstrengthof54.2orless.Whichstatisticalmeasureshouldbeusedtohelp determine the probability of the customer's test occurring?A)t-testB)z-scoreC)p-valueD)R-SquareB(Quiz 2) 7. The mean of 100 bank customers' waiting times for teller service is 5.8minuteswithastandarddeviationof1.5.Whattimerangewouldrepresenta95.4%probability customer waiting time?A)4.3to7.3B)2.8to8.8C)1.3 to13.0D)3.8 to7.5

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B(Quiz 2) 8. The revenue of NBA teams ranges from $226 million for the New YorkKnicksto$92millionfortheMilwaukeeBucks.Whichstatisticwouldmeasurehowfareach NBA team's revenue is from the NBA revenue mean?A)Z-scoreB)ModeC)MedianD)VarianceD(Quiz 2) 9. A local plumbing company is analyzing to see how the number weeks takenfortheirpaymentreceiptsisdistributed.Whichgraphicalanalysistechniqueshouldtheyuse?A)ScatterplotB)PieChartC)HistogramD)BoxPlotC(Quiz2)10.Giventhefollowingdataset:60,41,30,15,34,30WhatistheMedian?A)32B)30C)34D)35A(Quiz2) 11. A loanofficer comparestheinterest ratesfor48monthfixed-rate loansand48monthvariable-rateautoloans.Twoindependent,randomsamplesofautoloansareselected.Which two results happen when the null hypothesis is rejected using a t-test?(Pick 2)A)TheteststatisticislessthanthecriticalvalueB)Thenullhypothesisisrejectedgivenaprobabilityof beingwrongC)TheteststatisticisgreaterthanthecriticalvalueD)Thenullhypothesisisacceptedgivenaprobabilityof beingcorrect.B &C(Quiz 2) 12. An online marketing organization designed a social media that wants toearnatleast$250,000inrevenue.Thecampaign willreach10,000viewersandreceiveorders with a mean of $50 and standard deviation of $10. Which measure should beused to determine the probability of the campaign receiving at least $250,000?A)T-statisticB)Z-scoreC)MedianD)R-squaredB

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