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UCF QMB 3200 Final Exam Questions with 100% Correct Answers | Verified | Latest Update
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UCF QMB 3200 Final Exam Questionswith 100% Correct Answers | Verified |
Latest Update
Supposeiweihaveitheifollowingidata:i12,i17,i13,i25,i16,i21,i30,i14,i16,iandi
18.iToifindithei10%itrimmedimean,iwhatinumbersishouldibeideletedifro
mitheicalculation?i-iCorrectiAnswer-12iandi30
Whichiofitheifollowingiisinotiresistantitoitheioutliersiiniaidataiset?
a.iMedian
b.iMean
c.iVariance
d.iInterquartileirangei-iCorrectiAnswer-b.imean
Theipthipercentileiisiaivalueisuchithatiatileastipipercentiofitheiobservatio
nsiare:i-iCorrectiAnswer-lessithanioriequalitoithisivalue.
Whichiofitheifollowingiprovidesiaimeasureioficentralilocationiforitheidat
a?
a.iMean
b.iVariance
c.iMode
d.iStandardideviationi-iCorrectiAnswer-a.imean
,Whenitestingiwateriforichemicaliimpurities,iresultsiareioftenireportedia
siBDL,ithatiis,ibelowidetectionilimit.iTheifollowingidataisetigivesitheimea
surementsiofitheiamountiofileadiiniaiseriesiofiwaterisamplesitakenifromi
inner-cityihouseholdsi(ppm):
5,i7,i12,iBDL,i10,i8,iBDL,i20,i6
Whichiofitheifollowingiisicorrect?
a.iTheimeanileadileveliinitheiwateriisiabouti10ippm.
b.iTheimedianileadileveliinitheiwateriisi8ippm.
c.iTheimeanileadileveliinitheiwateriisiabouti8ippm.
d.iTheimedianileadileveliinitheiwateriisi7ippm.i-iCorrectiAnswer-
d.iTheimedianileadileveliinitheiwateriisi7ippm.
Aistudentimadeiscoresiofi85,i56,iandi91ioniherifirstithreeistatisticsitests.i
Whatiscoreidoesisheineeditoimakeioniherinextitestitoihaveiani80itestiave
rage?i-iCorrectiAnswer-88
GrowthifactorsiforitheipopulationiofiDallasiinitheipastifiveiyearsihaveibe
eni1,i2,i3,i4,iandi5,irespectively.iTheigeometricimeaniis:i-iCorrectiAnswer-
^5squareirooti120
Aisampleiofi99idistancesihasiaimeaniofi24ifeetiandiaimedianiofi21.5ifeet.i
Unfortunately,iitihasijustibeenidiscoveredithatianiobservationithatiwasie
rroneouslyirecordediasi"30"iactuallyihadiaivalueiofi"35."iIfiweimakeithisi
, correctionitoitheidata,ithen:i-iCorrectiAnswer-
theimedianiremainsitheisame,ibutitheimeaniisiincreased.
Ainumericalivalueiusediasiaisummaryimeasureiforiaisample,isuchiasisam
pleimean,iisiknowniasia:i-iCorrectiAnswer-sampleistatistic.
Theimeasureiofilocationithatiisimostilikelyitoibeiinfluencedibyiextremeiv
aluesiiniaidataisetiisithe:i-iCorrectiAnswer-mean
Aistudentiwasiperformingianiexperimentithaticomparediainewihighiprot
einifooditoitheioldifoodiforipigs.iHeifounditheimeaniweightigainiforisubje
ctsiconsumingitheinewifooditoibei12.8ipoundsiwithiaistandardideviationi
ofi3.5ipounds.iLater,iheirealizedithatitheiscaleiwasioutioficalibrationibyi1.
5ipoundsi(meaningithatitheiscaleiweighediitemsi1.5ipoundsimore).iWha
tishouldibeitheisummaryimeasures,imeaniandistandardideviation,iforith
eisubjectsiconsumingitheinewifood?i-iCorrectiAnswer-
Theimeanishouldibei11.3ianditheistandardideviationishouldiremainiunch
anged.
Wheniaisetiofidataihasisuspectioutliers,iwhichiofitheifollowingiisitheirefe
rredimeasureioficentralitendency?i-iCorrectiAnswer-median
Iniaisampleiofi500istudentsiwhoseimeaniheightiisi67.8iinches,i150iwerei
women.iIfitheimeaniheightiofitheiwomeniwasi63.0iinches,iwhatiisitheim
eaniheightiofitheimeniinitheisample?i-iCorrectiAnswer-69.9
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