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UCF QMB 3200 - Exam 3 Questions With 100% Correct Answers 2024
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UCF QMB 3200 - Exam 3 Questions With 100% Correct Answers
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UCF QMB 3200 - Exam 3 Questions With100% Correct Answers
residuali-iCorrectiAnswer-
Theidifferenceibetweenitheiobservedivalueiofitheidependentivariableia
nditheivalueipredictediusingitheiestimatediregressioniequationiisicalledi
a(n)
increaseitheivalueiofitheicorrelation.i-iCorrectiAnswer-
Influentialiobservationsialways:
normaliprobabilityiplot.i-iCorrectiAnswer-
Aigraphiofitheistandardizediresidualsiplottediagainstivaluesiofitheinorm
aliscoresithatihelpsitoidetermineiwhetheritheiassumptionithatitheierrori
termihasiainormaliprobabilityidistributioniappearsitoibeivalidiisicalledia:
lineari-iCorrectiAnswer-
Theitestsiofisignificanceiiniregressionianalysisiareibasedioniseveraliassu
mptionsiaboutitheierroritermiɛ.iAdditionally,iweimakeianiassumptioniab
outitheiformiofitheirelationshipibetweenixiandiy.iWeiassumeithatitheirel
ationshipibetweenixiandiyiis:
asitheivaluesiofixigetilarger,itheiabilityitoipredictiyibecomesilessiaccurate
.i-iCorrectiAnswer-Supposeiairesidualiplotiofixiversesitheiresiduals,iyi-
iŷ,ishowsiainonconstantivariance.iIniparticular,iasitheivaluesiofixiincrease
,isupposeithatitheivaluesiofitheiresidualsialsoiincrease.iThisimeansithat:
, theivalueiofitheicorrelation.i-iCorrectiAnswer-
Iniairegressionianalysis,ianioutlieriwillialwaysiincrease:
Falsei-iCorrectiAnswer-
Regressionianalysisicanibeiinterpretediasiaiprocedureiforiestablishingiaic
ause-and-effectirelationshipibetweenivariables.
significanceiiniregression.i-iCorrectiAnswer-
AniFitest,ibasedionitheiFiprobabilityidistribution,icanibeiuseditoitestifor:
independenti-iCorrectiAnswer-
Theitestsiofisignificanceiiniregressionianalysisiareibasedioniassumptionsi
aboutitheierroritermiɛ.iOneisuchiassumptioniisithatitheivaluesiofiɛiare:
tidistributioni-iCorrectiAnswer-
Wheniconstructingiaiconfidenceioriaipredictioniintervalitoiquantifyitheir
elationshipibetweenitwoiquantitativeivariables,iwhatidistributionidoico
nfidenceiandipredictioniintervalsifollow?
canibeiequalitoitheivalueiofitheicoefficientiofideterminationi(r2).i-
iCorrectiAnswer-Theivalueiofitheicoefficientioficorrelationi(r):
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