Exam (elaborations)
UCF QMB 3200 - Exam 3 Questions With 100% Correct Answers 2024
UCF QMB 3200 - Exam 3 Questions With 100% Correct Answers
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October 21, 2024
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2024/2025
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Exam (elaborations)
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Questions & answers
residual
normal probability plot
ucf qmb 3200 exam 3 questions with 100 correct
increase the value of the correlation
as the values of x get larger the ability to pred
the value of the correlation
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UCF QMB 3200
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UCF QMB 3200
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UCF QMB 3200 - Exam 3 Questions With
100% 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):