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UCF QMB 3200 FINAL Exam Questions With 100% Correct Answers 2024
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UCF QMB 3200 FINAL Exam Questions With 100% Correct Answers
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UCF QMB 3200 FINAL Exam QuestionsWith 100% Correct Answers
Autocorrelationi-iCorrectiAnswer-
Correlationiinitheierrorsithatiarisesiwhenitheierroritermsiatisuccessiveip
ointsiinitimeiareirelated.
Durbin-Watsonitesti-iCorrectiAnswer-Aitestitoidetermineiwhetherifirst-
orderiautocorrelationiisipresent.
Generalilinearimodeli-iCorrectiAnswer-
Aimodeliofitheiformiy=β0+β1z1+β2z2+⋯+βpzp+ε,iwhereieachiofitheiind
ependentivariablesizj(j=1,2,...,p)iisiaifunctioniofix1,x2,...,xk,itheivariable
siforiwhichidataihaveibeenicollected.
interactioni-iCorrectiAnswer-
Theieffectiproducediwhenitheilevelsiofioneifactoriinteractiwithitheilevels
iofianotherifactoriiniinfluencingitheiresponseivariable.
Theieffectiofitwoiindependentivariablesiactingitogether.
variableiselectioniproceduresi-iCorrectiAnswer-
Methodsiforiselectingiaisubsetiofitheiindependentivariablesiforiairegress
ionimodel.
,Timeiseriesi-iCorrectiAnswer-
Aisequenceiofiobservationsioniaivariableimeasurediatisuccessiveipointsii
nitimeiorioverisuccessiveiperiodsiofitime.
MeaniSquarediErrori(MSE)i-iCorrectiAnswer-
Theiaverageiofitheisumiofisquarediforecastierrors.
Timeiseriesiploti-iCorrectiAnswer-
Aigraphicalipresentationiofitheirelationshipibetweenitimeianditheitimeis
eriesivariable.iTimeiisishownionitheihorizontaliaxisianditheitimeiseriesiva
luesiareishownionitheiverticaliaxis.
horizontalipatterni-iCorrectiAnswer-
Aihorizontalipatterniexistsiwhenitheidataifluctuateiaroundiaiconstantim
ean.
movingiaveragei-iCorrectiAnswer-
Aiforecastingimethodithatiusesitheiaverageiofitheimostirecentikidataival
uesiinitheitimeiseriesiasitheiforecastiforitheinextiperiod.
stationaryitimeiseriesi-iCorrectiAnswer-
Aitimeiseriesiwhoseistatisticalipropertiesiareiindependentiofitime.iForiai
stationaryitimeiseriesitheiprocessigeneratingitheidataihasiaiconstantime
anianditheivariabilityiofitheitimeiseriesiisiconstantioveritime.
, trendipatterni-iCorrectiAnswer-
Aitrendipatterniexistsiifitheitimeiseriesiplotishowsigradualishiftsiorimove
mentsitoirelativelyihigheriorilowerivaluesioveriailongeriperiodiofitime.
smoothingiconstanti-iCorrectiAnswer-
Aiparameteriofitheiexponentialismoothingimodelithatiprovidesitheiweig
htigivenitoitheimostirecentitimeiseriesivalueiinitheicalculationiofitheifore
castivalue.
seasonalipatterni-iCorrectiAnswer-
Aiseasonalipatterniexistsiifitheitimeiseriesiplotiexhibitsiairepeatingipatte
rnioverisuccessiveiperiods.iTheisuccessiveiperiodsiareioftenione-
yeariintervals,iwhichiisiwhereitheinameiseasonalipatternicomesifrom.
cyclicalipatterni-iCorrectiAnswer-
Aicyclicalipatterniexistsiifitheitimeiseriesiplotishowsianialternatingiseque
nceiofipointsibelowiandiaboveitheitrendilineilastingimoreithanioneiyear.
meaniabsoluteierrori-iCorrectiAnswer-
Theiaverageiofitheiabsoluteivaluesiofitheiforecastierrors.
Wheniautocorrelationiisipresent...i-iCorrectiAnswer-
theierroritermsiareinotiindependent.
TheiDurbin-Watsonitestistatisticirangesiinivalueifromi-iCorrectiAnswer-
zeroitoifour
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