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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
Doublingitheisizeiofitheisampleiwilli-iCorrectiAnswer-
reduceitheistandardierroriofitheimean
Theisampleimeaniisitheipointiestimatoriofi-iCorrectiAnswer-U
AisimpleirandomisampleiofisizeinifromianiinfiniteipopulationiofisizeiNiisit
oibeiselected.iEachipossibleisampleishouldihavei-iCorrectiAnswer-
theisameiprobabilityiofibeingiselected
Whichiofitheifollowingistatementsiregardingitheisamplingidistributionio
fisampleimeansiisiincorrect?i-iCorrectiAnswer-
Theistandardideviationiofitheisamplingidistributioniisitheistandardidevia
tioniofitheipopulation.
Aisimpleirandomisampleiofisizeinifromianiinfiniteipopulationiisiaisamplei
selectedisuchithati-iCorrectiAnswer-
eachielementiisiselectediindependentlyiandiisiselectedifromitheisameip
opulation
Theifactithatitheisamplingidistributioniofisampleimeansicanibeiapproxim
atedibyiainormaliprobabilityidistributioniwheneveritheisampleisizeibeco
mesilargeiisibasedionithei-iCorrectiAnswer-centralilimititheorem.
,Clusterisamplingiisi-iCorrectiAnswer-aiprobabilityisamplingimethod.
Theicentralilimititheoremistatesithati-iCorrectiAnswer-
ifitheisampleisizeiniisilarge,ithenitheisamplingidistributioniofitheisamplei
meanicanibeiapproximatedibyiainormalidistribution.
Theivalueiofithei_____iisiuseditoiestimateitheivalueiofitheipopulationipar
ameteri-iCorrectiAnswer-sampleistatistic
Theisamplingidistributioniofiisithei-iCorrectiAnswer-
probabilityidistributioniofiallipossibleivaluesiofitheisampleiproportion.
Whichiofitheifollowingiisinotiaisymboliforiaiparameter?i-
iCorrectiAnswer-S.
Theisampleistatisticicharacteristicisiisitheipointiestimatoriofi-
iCorrectiAnswer-σ..
Theidistributioniofivaluesitakenibyiaistatisticiiniallipossibleisamplesiofith
eisameisizeifromitheisameipopulationiisicallediai-iCorrectiAnswer-
samplingidistribution.
Whichiofitheifollowingiisiaipointiestimator?i-iCorrectiAnswer-S.
,Asiairuleiofithumb,itheisamplingidistributioniofitheisampleiproportionica
nibeiapproximatedibyiainormaliprobabilityidistributioniwheni-
iCorrectiAnswer-n(1i-ip)i≥i5iandinpi≥i5.
Aisampleiofi92iobservationsiisitakenifromianiinfiniteipopulation.iTheisa
mplingidistributioniofiisiapproximatelyi-iCorrectiAnswer-
normalibecauseiofitheicentralilimititheorem.
TheicentralilimititheoremiisiimportantiiniStatisticsibecauseiitienablesirea
sonablyiaccurateiprobabilitiesitoibeideterminediforieventsiinvolvingithei
sampleiaveragei-iCorrectiAnswer-
whenitheisampleisizeiisilargeiregardlessiofitheidistributioniofitheivariabl
e.
Theidistributioniofivaluesitakenibyiaistatisticiiniallipossibleisamplesiofith
eisameisizeifromitheisameipopulationiisitheisamplingidistributioniofi-
iCorrectiAnswer-Theisample
Whichiofitheseibestidescribesiaisamplingidistributioniofiaistatistic?i-
iCorrectiAnswer-
Itiisitheidistributioniofialliofitheistatisticsicalculatedifromiallipossibleisam
plesiofitheisameisampleisize.
Theiprobabilityidistributioniofiallipossibleivaluesiofitheisampleiproporti
oniisithei-iCorrectiAnswer-samplingidistributioniofip.
, Foriaifixediconfidenceileveliandipopulationistandardideviation,iifiweiwo
uldilikeitoicutiourimarginiofierroriinihalf,iweishoulditakeiaisampleisizeitha
tiisi-iCorrectiAnswer-fouritimesiasilargeiasitheioriginalisampleisize.
Weicanireduceitheimarginiofierroriinianiintervaliestimateiofipibyidoingian
yiofitheifollowingiexcepti-iCorrectiAnswer-
increasingitheiplanningivalueip*itoi.5.
Whenicomputingitheisampleisizeineededitoiestimateiaiproportioniwithi
niaigivenimarginiofierroriforiaispecificiconfidenceilevel,iwhatiplanningival
ueiofipishouldibeiusediwheninoiestimateiofipiisiavailable?i-
iCorrectiAnswer-0.50
Aistatisticsiteacheristartediclassioneidayibyidrawingitheinamesiofi10istud
entsioutiofiaihatiandiaskedithemitoidoiasimanyipushupsiasitheyicould.iTh
ei10irandomlyiselectedistudentsiaveragedi15ipushupsiperipersoniwithiai
standardideviationiofi9ipushups.iSupposeitheidistributioniofitheipopulat
ioniofinumberiofipushupsithaticanibeidoneiisiapproximatelyinormal.iWhi
chiofitheifollowingistatementsiisitrue?i-iCorrectiAnswer-
Aitidistributionishouldibeiusedibecauseiσiisiunknown.
Theizivalueiforiai99%iconfidenceiintervaliestimationiisi-iCorrectiAnswer-
2.58
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