WGU C207 Data Driven Decision Making Ex
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am Questions With 100% Correct Answers
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2024 f
HowfwouldfafgreaterfnumberfoffsamplesfandfaffewerfnumberfoffpopulationsfaffectfanfANOV
Afanalysis?f-fCorrectfAnswer-Thefresultsfwouldfbefmorefaccurate.
Maryfisfdeterminingftheflikelihoodfthatfshefwillflosefmoneyfonfanfinvestment.fTherefisfanfexp
ectedf10fpercentfgainfinfafnormallyfdistributedfdataset,fwithfafstandardfdeviationfoff10fperce
nt.fTheflikelihoodfshe'llflosefmoneyfisf_______fpercent.f-fCorrectfAnswer-16
Selectfthefchoicefthatfisftrue.fRegressionfanalysis:f-fCorrectfAnswer-
takesfinformationffromfonefdatafsetfandfcanfpredictfinformationfforfanotherfdatafset.
Janefworksfforfafpublicfhealthfcompany.fShefisfworkingfonfanfanti-
tobaccofcampaignfandfisfinterestedfinfhowfsmokingfcigarettesfaffectsfafsmoker'sfcholesterol
.fShefcouldfusefthefnumberfoffcigarettesfsmokedfperfdayfasfherf_____fvariablefandfplacefitfo
nfthef__-axis.f-fCorrectfAnswer-independent,fx
Wefperformfafregressionfanalysisfonfafpairfoffvariablesfandfdeterminefthatftherefisfaflinearfrel
ationship.fThefregressionflinefisfdeterminedftofbefy=12x−5y=12x-
5.fWhatftypefofflinearfrelationshipfexistsfbetweenfthefindependentfvariable,fx,fandfthefdepen
dentfvariable,fy?f-fCorrectfAnswer-positive
describefR-squared?f-fCorrectfAnswer-a)fR-squaredfmeasuresfthefgoodnessfofffit.
b)fR-squaredfcanfbefmisleadingfifftherefareffalsefindependentfvariables.
c)fR-squaredfisf1.0fwhenfcorrelationfisf-1forf1.
Whichfofftheffollowingfareftechniquefafmanagerfusesfwhenfforecasting?f-fCorrectfAnswer-
A)TimefSeries
c)fAssociative
d)fJudgmental
Whichfofftheffollowingfarefadvantagesfoffclusterfanalysis?f-fCorrectfAnswer-
b)fItfsortsfindividualfdatafpointsfintofdifferentfgroups.
c)fItfwillfnotfhelpfinfdeterminingftargetfmarkets.
d)fItfdoesfnotfidentifyfsuccessfulfandfunsuccessfulfhabitsfandfsystems.
Aftrendfis...f-fCorrectfAnswer-afgeneralfslopefupwardforfdownwardfoverfaflongfperiodfofftime.
Ifftherefisfafrelationshipfbetweenfvariables,fbutfthefrelationshipfisfnotflinear,fwhatfpossiblefch
allengefwithfregressionfcouldfitfbe?f-fCorrectfAnswer-PolynomialfRegression
,CatherinefisftryingftofsellfafticketftofthefSuperfBowl.fShefisfdeterminingfwhetherforfnotfshefsho
uldfsellfafticketfnowforfwaitfuntilfjustfbeforefthefgamefandftryfandfsellfitfthen.fCurrently,fsomeo
nefisfofferingf$350fforfthefticket.fFromfresearchfoffpastfprices,fshefknowsfthatfthefticketsfimm
ediatelyfbeforefthefSuperfBowlfarefsoldfforfaboutf$500.fShefdeterminesfthatftherefisfaf75fperc
entfchancefshefwillfbefableftofsellfthefticketfimmediatelyfbeforefthefSuperfBowl.fBasedfonfexp
ectedfpayoffsffromfriskfdecisionfmaking,fwhatfshouldfshefdo?fHowfmuchfisfthefdifferencefiffs
hefchoosesftofsellfnowf-fCorrectfAnswer-
Catherinefshouldfwaitftofsellfticket;fthefdifferencefwillfbef$25.
Heteroscedasticityf-fCorrectfAnswer-
Afregressionfinfwhichfthefvariancesfinfyfforfthefvaluesfoffxfarefnotfequal
CumulativefAverage-TimefLearningfModelf-fCorrectfAnswer-
Aflearningfcurvefmodelfinfwhichfthefcumulativefaverageftimefperfunitfdeclinesfbyfafconstantfp
ercentagefeachftimefthefcumulativefquantityfoffunitsfproducedfisfdoubled
DependentfVariablef-fCorrectfAnswer-
Thefvariablefwhosefvaluefdependsfonfoneforfmorefvariablesfinfthefequation;ftypicallyfthefcos
tforfactivityftofbefpredicted
IndependentfVariablef-fCorrectfAnswer-
Thefvariablefpresumedftofinfluencefanotherfvariablef(dependentfvariable);ftypicallyfitfisfthefl
evelfoffactivityforfcostfdriver
AnalysisfoffVariancef(ANOVA)f-fCorrectfAnswer-
Afstatisticalfmethodfthatfhelpsfidentifyfthefsourcesfoffvariabilityfbyfcomparingftheirfmeansforf
averages;fitfcomparesfthefvariationfwithinfafsampleftofthefvariationfbetweenfsamplesftofseefif
fanyf differencesfarefthefresultf offsomefcontributingffactorforf iffthefdifferencesfoccurf byf chance
falon
ExperiencefCurvef-fCorrectfAnswer-
Afcurvefthatfshowsfthefdeclinefinfcostfperfunitfinfvariousfbusinessffunctionsfoffthefvaluefchainf
asfthefamountfoffthesefactivitiesfincreases
CrossoverfAnalysisf-fCorrectfAnswer-
Allowsfafdecisionfmakerftofidentifyfthefcrossoverfpoint,fwhichfrepresentsfthefpointfatfwhichfw
efarefindifferentfbetweenfthefplans
Cyclicalityf-fCorrectfAnswer-
Repetitionfoffupf(peaks)forfdownfmovementsf(troughs)fthatffollowforfcounteractfafbusinessfc
yclefthatfcanflastfseveralfyears
LinearfProgrammingf-fCorrectfAnswer-
Afmathematicalftoolfusedftofoptimizefaffunctionf(thefobjectiveffunction)fsubjectftofvariousfcon
straints,fallfoffwhichfareflinear.fOftenfusedftoffindfthefcombinationfoffproductsfthatfwillfmaximi
zefprofitsforfminimizefcosts
, SimplefLinearfRegressionf-fCorrectfAnswer-
Afformfoffregressionfanalysisfwithfonlyfonefindependentfvariable
RegressionfLinef-fCorrectfAnswer-
thef"linefoffbestffit"fwherefthefmarginfofferrorfatfeveryfpointfisfminimized
DatafManagementf-fCorrectfAnswer-
Thefmanagement,fincludingfcleaningfandfstorage,foffcollectedfdata
RandomfVariationf-fCorrectfAnswer-
Thefvariabilityfoffafprocessfwhichfmightfbefcausedfbyfirregularffluctuationsfdueftofchanceftha
tfcannotfbefanticipated,fdetected,forfeliminated
Seasonalityf-fCorrectfAnswer-Regularfpatternfoffvolatility,fusuallyfwithinfafsinglefyear
Homoscedasticityf-fCorrectfAnswer-
Afregressionfinfwhichfthefvariancesfinfyfforfthefvaluesfoffxfarefequalforfcloseftofequal
Irregularityf-fCorrectfAnswer-One-
timefdeviationsffromfexpectationsfcausedfbyfunforeseenfcircumstancesfsuchfasfwar,fnatura
lfdisasters,fpoorfweather,flaborfstrikes,fsingle-occurrencefcompany-
specificfsurprisesforfmacroeconomicfshocks
Chi-squaredfTestf-fCorrectfAnswer-
Afhypothesisftestfthatfisfusedftofexaminefthefdistributionfoffcategoricalfdata
ExpectedfValuef-fCorrectfAnswer-
ThefExpectedfValuefforfanfalternativefisfthefsumfoffallfpossiblefpayoffsfforfthatfalternative,fea
chfweightedfbyfthefprobabilityfoffthatfpayofffoccurring
MultiplefLinearfRegressionf-fCorrectfAnswer-
Afstatisticalfmethodfusedftofmodelfthefrelationshipfbetweenfonefdependentf(orfresponse)fva
riablefandftwoforfmorefindependentf(orfexplanatory)fvariablesfbyffittingfaflinearfequationftofo
bservedfdata
RegressionfAnalysisf-fCorrectfAnswer-
Afstatisticalfanalysisftoolfthatfquantifiesfthefrelationshipfbetweenfafdependentfvariablefandfo
neforfmorefindependentfvariables
DecisionfTreef-fCorrectfAnswer-
Afdiagramfoffpossiblefalternativesfandftheirfexpectedfconsequencesfusedftofformulatefpossi
blefcoursesfoffactionsfinforderftofmakefdecisions
TimefSeriesfAnalysisf-fCorrectfAnswer-
Regressionfanalysisfthatfusesftimefasfthefindependentfvariable
f f f f f f
am Questions With 100% Correct Answers
f f f f f f
2024 f
HowfwouldfafgreaterfnumberfoffsamplesfandfaffewerfnumberfoffpopulationsfaffectfanfANOV
Afanalysis?f-fCorrectfAnswer-Thefresultsfwouldfbefmorefaccurate.
Maryfisfdeterminingftheflikelihoodfthatfshefwillflosefmoneyfonfanfinvestment.fTherefisfanfexp
ectedf10fpercentfgainfinfafnormallyfdistributedfdataset,fwithfafstandardfdeviationfoff10fperce
nt.fTheflikelihoodfshe'llflosefmoneyfisf_______fpercent.f-fCorrectfAnswer-16
Selectfthefchoicefthatfisftrue.fRegressionfanalysis:f-fCorrectfAnswer-
takesfinformationffromfonefdatafsetfandfcanfpredictfinformationfforfanotherfdatafset.
Janefworksfforfafpublicfhealthfcompany.fShefisfworkingfonfanfanti-
tobaccofcampaignfandfisfinterestedfinfhowfsmokingfcigarettesfaffectsfafsmoker'sfcholesterol
.fShefcouldfusefthefnumberfoffcigarettesfsmokedfperfdayfasfherf_____fvariablefandfplacefitfo
nfthef__-axis.f-fCorrectfAnswer-independent,fx
Wefperformfafregressionfanalysisfonfafpairfoffvariablesfandfdeterminefthatftherefisfaflinearfrel
ationship.fThefregressionflinefisfdeterminedftofbefy=12x−5y=12x-
5.fWhatftypefofflinearfrelationshipfexistsfbetweenfthefindependentfvariable,fx,fandfthefdepen
dentfvariable,fy?f-fCorrectfAnswer-positive
describefR-squared?f-fCorrectfAnswer-a)fR-squaredfmeasuresfthefgoodnessfofffit.
b)fR-squaredfcanfbefmisleadingfifftherefareffalsefindependentfvariables.
c)fR-squaredfisf1.0fwhenfcorrelationfisf-1forf1.
Whichfofftheffollowingfareftechniquefafmanagerfusesfwhenfforecasting?f-fCorrectfAnswer-
A)TimefSeries
c)fAssociative
d)fJudgmental
Whichfofftheffollowingfarefadvantagesfoffclusterfanalysis?f-fCorrectfAnswer-
b)fItfsortsfindividualfdatafpointsfintofdifferentfgroups.
c)fItfwillfnotfhelpfinfdeterminingftargetfmarkets.
d)fItfdoesfnotfidentifyfsuccessfulfandfunsuccessfulfhabitsfandfsystems.
Aftrendfis...f-fCorrectfAnswer-afgeneralfslopefupwardforfdownwardfoverfaflongfperiodfofftime.
Ifftherefisfafrelationshipfbetweenfvariables,fbutfthefrelationshipfisfnotflinear,fwhatfpossiblefch
allengefwithfregressionfcouldfitfbe?f-fCorrectfAnswer-PolynomialfRegression
,CatherinefisftryingftofsellfafticketftofthefSuperfBowl.fShefisfdeterminingfwhetherforfnotfshefsho
uldfsellfafticketfnowforfwaitfuntilfjustfbeforefthefgamefandftryfandfsellfitfthen.fCurrently,fsomeo
nefisfofferingf$350fforfthefticket.fFromfresearchfoffpastfprices,fshefknowsfthatfthefticketsfimm
ediatelyfbeforefthefSuperfBowlfarefsoldfforfaboutf$500.fShefdeterminesfthatftherefisfaf75fperc
entfchancefshefwillfbefableftofsellfthefticketfimmediatelyfbeforefthefSuperfBowl.fBasedfonfexp
ectedfpayoffsffromfriskfdecisionfmaking,fwhatfshouldfshefdo?fHowfmuchfisfthefdifferencefiffs
hefchoosesftofsellfnowf-fCorrectfAnswer-
Catherinefshouldfwaitftofsellfticket;fthefdifferencefwillfbef$25.
Heteroscedasticityf-fCorrectfAnswer-
Afregressionfinfwhichfthefvariancesfinfyfforfthefvaluesfoffxfarefnotfequal
CumulativefAverage-TimefLearningfModelf-fCorrectfAnswer-
Aflearningfcurvefmodelfinfwhichfthefcumulativefaverageftimefperfunitfdeclinesfbyfafconstantfp
ercentagefeachftimefthefcumulativefquantityfoffunitsfproducedfisfdoubled
DependentfVariablef-fCorrectfAnswer-
Thefvariablefwhosefvaluefdependsfonfoneforfmorefvariablesfinfthefequation;ftypicallyfthefcos
tforfactivityftofbefpredicted
IndependentfVariablef-fCorrectfAnswer-
Thefvariablefpresumedftofinfluencefanotherfvariablef(dependentfvariable);ftypicallyfitfisfthefl
evelfoffactivityforfcostfdriver
AnalysisfoffVariancef(ANOVA)f-fCorrectfAnswer-
Afstatisticalfmethodfthatfhelpsfidentifyfthefsourcesfoffvariabilityfbyfcomparingftheirfmeansforf
averages;fitfcomparesfthefvariationfwithinfafsampleftofthefvariationfbetweenfsamplesftofseefif
fanyf differencesfarefthefresultf offsomefcontributingffactorforf iffthefdifferencesfoccurf byf chance
falon
ExperiencefCurvef-fCorrectfAnswer-
Afcurvefthatfshowsfthefdeclinefinfcostfperfunitfinfvariousfbusinessffunctionsfoffthefvaluefchainf
asfthefamountfoffthesefactivitiesfincreases
CrossoverfAnalysisf-fCorrectfAnswer-
Allowsfafdecisionfmakerftofidentifyfthefcrossoverfpoint,fwhichfrepresentsfthefpointfatfwhichfw
efarefindifferentfbetweenfthefplans
Cyclicalityf-fCorrectfAnswer-
Repetitionfoffupf(peaks)forfdownfmovementsf(troughs)fthatffollowforfcounteractfafbusinessfc
yclefthatfcanflastfseveralfyears
LinearfProgrammingf-fCorrectfAnswer-
Afmathematicalftoolfusedftofoptimizefaffunctionf(thefobjectiveffunction)fsubjectftofvariousfcon
straints,fallfoffwhichfareflinear.fOftenfusedftoffindfthefcombinationfoffproductsfthatfwillfmaximi
zefprofitsforfminimizefcosts
, SimplefLinearfRegressionf-fCorrectfAnswer-
Afformfoffregressionfanalysisfwithfonlyfonefindependentfvariable
RegressionfLinef-fCorrectfAnswer-
thef"linefoffbestffit"fwherefthefmarginfofferrorfatfeveryfpointfisfminimized
DatafManagementf-fCorrectfAnswer-
Thefmanagement,fincludingfcleaningfandfstorage,foffcollectedfdata
RandomfVariationf-fCorrectfAnswer-
Thefvariabilityfoffafprocessfwhichfmightfbefcausedfbyfirregularffluctuationsfdueftofchanceftha
tfcannotfbefanticipated,fdetected,forfeliminated
Seasonalityf-fCorrectfAnswer-Regularfpatternfoffvolatility,fusuallyfwithinfafsinglefyear
Homoscedasticityf-fCorrectfAnswer-
Afregressionfinfwhichfthefvariancesfinfyfforfthefvaluesfoffxfarefequalforfcloseftofequal
Irregularityf-fCorrectfAnswer-One-
timefdeviationsffromfexpectationsfcausedfbyfunforeseenfcircumstancesfsuchfasfwar,fnatura
lfdisasters,fpoorfweather,flaborfstrikes,fsingle-occurrencefcompany-
specificfsurprisesforfmacroeconomicfshocks
Chi-squaredfTestf-fCorrectfAnswer-
Afhypothesisftestfthatfisfusedftofexaminefthefdistributionfoffcategoricalfdata
ExpectedfValuef-fCorrectfAnswer-
ThefExpectedfValuefforfanfalternativefisfthefsumfoffallfpossiblefpayoffsfforfthatfalternative,fea
chfweightedfbyfthefprobabilityfoffthatfpayofffoccurring
MultiplefLinearfRegressionf-fCorrectfAnswer-
Afstatisticalfmethodfusedftofmodelfthefrelationshipfbetweenfonefdependentf(orfresponse)fva
riablefandftwoforfmorefindependentf(orfexplanatory)fvariablesfbyffittingfaflinearfequationftofo
bservedfdata
RegressionfAnalysisf-fCorrectfAnswer-
Afstatisticalfanalysisftoolfthatfquantifiesfthefrelationshipfbetweenfafdependentfvariablefandfo
neforfmorefindependentfvariables
DecisionfTreef-fCorrectfAnswer-
Afdiagramfoffpossiblefalternativesfandftheirfexpectedfconsequencesfusedftofformulatefpossi
blefcoursesfoffactionsfinforderftofmakefdecisions
TimefSeriesfAnalysisf-fCorrectfAnswer-
Regressionfanalysisfthatfusesftimefasfthefindependentfvariable
