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ISYE 6414 MIDTERM PREP QUESTIONS AND 100% CORRECT ANSWERS 2024
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ISYE 6414 MIDTERM PREP QUESTIONS AND 100% CORRECT ANSWERS 2024
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ISYE 6414 MIDTERM PREP QUESTIONSAND 100% CORRECT ANSWERS 2024
WePcanPassessPthePconstantPvariancePassumptionPinPlinearPregressionPbyPplottingPthePresidualsPvs.PfittedPv
alues.P-PANSWERPTrue
IfPonePconfidencePintervalPinPthePpairwisePcomparisonPinPANOVAPincludesPzero,PwePconcludePthatPthePtwoP
correspondingPmeansParePplausiblyPequal.P-PANSWERPTrue
ThePassumptionPofPnormalityPisPnotPrequiredPinPlinearPregressionPtoPmakePinferencePonPthePregressionPcoe
fficients.P-PANSWERPFalseP(Explanation:PisPrequired)
WePcannotPestimatePaPmultiplePlinearPregressionPmodelPifPthePpredictingPvariablesParePlinearlyPindepende
nt.P-PANSWERPFalseP(Explanation:PlinearlyPdependent)
IfPaPpredictingPvariablePisPaPcategoricalPvariablePwithP5PcategoriesPinPaPlinearPregressionPmodelPwithoutPint
ercept,PwePwillPincludeP5PdummyPvariables.P-PANSWERPTrue
IfPthePnormalityPassumptionPdoesPnotPholdPforPaPregression,PwePmayPusePaPtransformationPonPthePrespons
ePvariable.P-PANSWERPTrue
ThePpredictionPofPthePresponsePvariablePhasPhigherPuncertaintyPthanPthePestimationPofPthePmeanPrespons
e.P-PANSWERPTrue
StatisticalPinferencePforPlinearPregressionPunderPnormalityPreliesPonPlargePsamplePsize.P-
PANSWERPFalseP(Explanation:PsmallPsamplePsizePisPfine)
APnonlinearPrelationshipPbetweenPthePresponsePvariablePandPaPpredictingPvariablePcannotPbePmodeledPusi
ngPregression.P-
PANSWERPFalseP(Explanation:PNonlinearPrelationshipsPcanPoftenPbePmodeledPusingPlinearPregressionPbyPinc
ludingPpolynomialPtermsPofPthePpredictingPvariable,PforPexample.)
AssumptionPofPnormalityPinPlinearPregressionPisPrequiredPforPconfidencePintervals,PpredictionPintervals,Pan
dPhypothesisPtesting.P-PANSWERPTrue
, IfPthePconfidencePintervalPforPaPregressionPcoefficientPcontainsPthePvaluePzero,PwePinterpretPthatPthePregres
sionPcoefficientPisPplausiblyPequalPtoPzero.P-PANSWERPTrue
ThePsmallerPthePcoefficientPofPdeterminationPorPR-
squared,PthePhigherPthePvariabilityPexplainedPbythePsimplePlinearPregression.P-
PANSWERPFalseP(Explanation:PThePlargerPthePR-squared)
ThePestimatorsPofPthePvariancePparameterPandPofPthePregressionPcoefficientsPinPaPregressionPmodelParePra
ndomPvariables.P-PANSWERPTrue
ThePstandardPerrorPinPlinearPregressionPindicatesPhowPfarPthePdataPpointsParePfromPthePregressionPline,PonP
average.P-PANSWERPTrue
APlinearPregressionPmodelPisPaPgoodPfitPtoPthePdataPsetPifPthePR-squaredPisPaboveP0.90.P-
PANSWERPFalseP(Explanation:PThereParePotherPthingsPtoPcheck:Passumptions,PMSE,Petc.)
InPANOVA,PwePassumePthePvariancePofPthePresponsePvariablePisPdifferentPforPeachPpopulation.P-
PANSWERPFalseP(Explanation:PisPthePsamePacrossPallPpopulations)
ThePF-testPinPANOVAPcomparesPthePbetweenPvariabilityPversusPthePwithinPvariability.P-PANSWERPTrue
InPtestingPforPsubsetsPofPcoefficientsPinPaPmultiplePlinearPregression,PthePnullPhypothesisPwePtest
forPisPthatPallPcoefficientsParePequal;
H_0:PB_1P=PB_2P=P...P=PB_kfP-
PANSWERPFalseP(Explanation:PThePnullPhypothesisPisPthatPallPcoefficientsParePequalPtoPzero;PnoneParePsignifi
cantPinPpredictingPthePresponse.)
ThePonlyPassumptionsPforPaPsimplePlinearPregressionPmodelParePlinearity,PconstantPvariance,PandPnormality
.P-PANSWERPFalse
InPaPsimplePlinearPregressionPmodel,PthePvariablePofPinterestPisPthePresponsePvariable.P-PANSWERPTrue
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