WGU C955 - MODULE 6: CORRELATION & REGRESSION QUESTIONS AND ANSWERS 2025

WGU C955 - MODULE 6: CORRELATION
& REGRESSION QUESTIONS AND
ANSWERS 2025
AAresearcherAwantsAtoAknowAifAthereAwasAaArelationshipAbetweenAstudentAageAandAdesireA
toAcompleteAaAcollegeAdegree.AToAanswerAthisAquestion,AtheAresearcherAusedAaAlocalA
CommunityAcollegeAasAtheAsamplingAframeAandAthenAusedAstratifiedAsamplingAtoAgetAaA
sampleAofAstudentsAfromA18AtoA80AyearsAold.ABasedAonAtheAinformationAgiven,AisAthereAany
ApotentialAbiasAinAthisAstudy?




aAYes,AbecauseAtheAsamplingAframeAdoesAnotAmatchAtheAintendedApopulationAofAtheAquest
ion.
bAYes,AbecauseAtheAsamplingAmethodAwillAnotAgiveAaArepresentativeAsample.
cAYes,AbecauseAaAvoluntaryAsampleAshouldAhaveAbeenAused.
dANo,AthereAwillAlikelyAbeAnoAbiasAinAthisAstudy.A-ACORRECTAANSWERS-
Yes,AbecauseAtheAsamplingAframeAdoesAnotAmatchAtheAintendedApopulationAofAtheAquestio
n.
AAresearcherAconductsAanAobservationalAstudyAandAfindsAaAcorrelationAbetweenAmanager
s'AincomeAandAtheAnumberAofAcollegeAcreditsAearned.ATheAcorrelationAcoefficientAwasAr=.8
5AwithAaAregressionAequationAofAy=515x+12000.AWhatAcanAyouAsayAaboutAtheArelationship
AbetweenAtheseAvariables?




aAThereAisAanAassociationAbetweenAtheseAvariables
bAThereAisAaAcausationAbetweenAtheseAvariables.
cAThereAisAnoArelationshipAbetweenAtheseAvariables.
dAThereAisAnotAenoughAinformationAtoAdetermineAtheArelationshipAbetweenAtheAvariables.A-
ACORRECTAANSWERS-ThereAisAanAassociationAbetweenAtheseAvariables

WhatAtechniqueAisAusedAtoAestimateAtheAprofitAmarginAforAaAproductionAlevelAofA25Athousan
dAunits,AifAaAlineAofAbestAfitAisAcreatedAtoAestimateAprofitAmarginAforAproductionAlevelsAbetwe
enA20AtoA39AthousandAunits?

aAInterpolation
bALinearization
cAExtrapolation
dAInternalizationA-ACORRECTAANSWERS-Interpolation
WhatAisAtheAmostAappropriateAdefinitionAofAaAscatterplot?

aAAAgraphAthatAusesAdotsAtoAdemonstrateArelationshipsAbetweenAtwoAcategoricalAvariables
.
bAAAgraphAwhereAlinesAareAshownAtoArepresentApositiveAorAnegativeAtrends.
cAAAgraphAwhereAtheAexplanatoryAandAresponseAvariablesAareAplottedAasAorderedApairs.

, dAAAgraphAwhereAaApositiveAcausationAisAalwaysArepresentedAwithAdotsAformingAaAstraightA
line.A-ACORRECTAANSWERS-
AAgraphAwhereAtheAexplanatoryAandAresponseAvariablesAareAplottedAasAorderedApairs.
WhatAdoesAaAstrongApositiveAcorrelationAbetweenAtwoAvariablesAsuggest?

aATheAexplanatoryAvariableAisAincreasingAandAtheAresponseAvariableAisAdecreasing
bAThereAisAanAassociationAbetweenAtheAvariables
cAThereAisAaAcausationAbetweenAtheAvariables
dACannotAdetermineA-ACORRECTAANSWERS-
ThereAisAanAassociationAbetweenAtheAvariables
{{AScatterplotAofAdistanceAfromAcityAcenterAvs.Arent.ATheAlinearAequationAforAthisAscatterplot
AisAyAequalsAnegativeAoneAhundredAfiveAtenAthousandthsAtimesAxAplusAtenAandAthreeAhundr

edAeightyAoneAthousandths.A}}
UsingAtheAscatterplotADistanceAfromACityACenterAvs.AMonthlyARent,AhowAfarAcanAweAexpec
tAanAapartmentAtoAbeAfromAtheAcityAcenterAifAtheAmonthlyArentAisA$A980A?ARoundAyourAansw
erAtoAtheAnearestAmile.

aAAroundA54Amiles
bAAroundA55Amiles
cAAroundA56Amiles
dAAroundA57AmilesA-ACORRECTAANSWERS-AroundA55Amiles
WhichAcorrelationAcoefficientAsuggestsAtheAweakestAcorrelation?

aA−0.9A
bA−0.3A
cA0.1A
dA1A-ACORRECTAANSWERS-0.1
WhatAdoesAitAmeanAforAaAresultAorArelationshipAtoAbeAstatisticallyAsignificant?

aATheArelationshipAisAnotAcausedAbyAmereAchance.
bATheArelationshipAisAcausedAbyAchance.
cAYourAhypothesisAtestAhasAfailed.
dAYourAsignificanceAlevelAisAnotAhighAenough.A-ACORRECTAANSWERS-
TheArelationshipAisAnotAcausedAbyAmereAchance.
WhatAisAtheAprocessAusedAtoAcreateAtheAequationAforAtheAlineAofAbestAfit?

aACompletingAtheAsquare
bALeastAsquaresAestimation
cAFittingAtheAlineAtoAtheAcurve
dALinearAapproximationA-ACORRECTAANSWERS-LeastAsquaresAestimation
AArelationshipAbetweenAtwoAorAmoreAvariablesAisAknownAasAa(n)A________.

aACausation
bAAssociation
cACauseAandAeffect
dACorrelationA-ACORRECTAANSWERS-Association