MULTIPLE CHOICE QUESTIONS英文考试题含答案.docx
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MULTIPLE CHOICE QUESTIONS英文考试题含答案.docx
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MULTIPLECHOICEQUESTIONS英文考试题含答案
CHAPTER1
WHATISSTATISTICS?
SECTIONS1-4
MULTIPLECHOICEQUESTIONS
Inthefollowingmultiple-choicequestions,pleasecirclethecorrectanswer.
1.Youaskedfiveofyourclassmatesabouttheirheight.Onthebasisofthisinformation,
youstatedthattheaverageheightofallstudentsinyouruniversityorcollegeis65inches.
Thisisanexampleof:
a.descriptivestatistics
b.statisticalinference
c.parameter
d.population
ANSWER:
b
2.Acompanyhasdevelopedanewcomputersoundcard,buttheaveragelifetimeis
unknown.Inordertoestimatethisaverage,200soundcardsarerandomlyselectedfroma
largeproductionlineandtestedandtheaveragelifetimeisfoundtobe5years.The200
soundcardsrepresentthe:
a.parameter
b.statistic
c.sample
d.population
ANSWER:
c
1
2ChapterOne
3.
Asummarymeasurethatiscomputedfromasampletodescribeacharacteristicofthe
populationiscalleda
a.parameter
b.statistic
c.population
d.sample
ANSWER:
b
4.
Asummarymeasurethatiscomputedfromapopulationiscalleda
parametera.
statisticb.
populationc.
sampled.
a
ANSWER:
5.
Whendataarecollectedinastatisticalstudyforonlyaportionorsubsetofallelements
ofinterest,weareusinga:
samplea.
parameterb.
populationc.
statisticd.a
ANSWER:
6.
Whichofthefollowingisnotthegoalofdescriptivestatistics?
Summarizingdata
a.Displayingaspectsofthecollecteddatab.
Reportingnumericalfindings
c.
Estimatingcharacteristicsofthepopulationd.d
ANSWER:
7.
Whichofthefollowingstatementsisnottrue?
Oneformofdescriptivestatisticsusesgraphicaltechniquesa.
Oneformofdescriptivestatisticsusesnumericaltechniques
b.Inthelanguageofstatistics,populationreferstoagroupofpeople
c.
Statisticalinferenceisusedtodrawconclusionsorinferencesaboutcharacteristicsofd.populationsbasedonsampledata
c
ANSWER:
8.
Descriptivestatisticsdealswithmethodsof:
organizingdataa.
summarizingdata
b.
presentingdatainaconvenientandinformativewayc.Alloftheaboved.d
ANSWER:
WhatIsStatistics?
3
9.
Apoliticianwhoisrunningfortheofficeofgovernorofastatewith4millionregistered
voterscommissionsasurvey.Inthesurvey,54%ofthe5,000registeredvoters
interviewedsaytheyplantovoteforher.Thepopulationofinterestisthe:
a.4millionregisteredvotersinthestate
b.5,000registeredvotersinterviewed
c.2,700votersinterviewedwhoplantovoteforher.
d.2,300votersinterviewedwhoplannottovoteforher
ANSWER:
a
10.
Acompanyhasdevelopedanewbattery,buttheaveragelifetimeisunknown.Inorderto
estimatethisaverage,asampleof500batteriesistestedandtheaveragelifetimeofthis
sampleisfoundtobe225hours.The225hoursisthevalueofa:
parametera.
statisticb.
samplec.
populationd.
b
ANSWER:
11.
conclusionsabouttruepopulationTheprocessofusingsamplestatisticstodraw
parametersiscalled
inferentialstatisticsa.thescientificmethodb.
samplingmethodc.
descriptivestatisticsd.
ANSWER:
a
12.
Whichofthefollowingismostlikelyapopulationasopposedtoasample?
Respondentstoamagazinesurvey
a.
Thefirst10studentscompletingafinalexam
b.Everyfifthstudenttoarriveatthebookstoreonyourcampusc.RegisteredvotersintheStateofMichigand.d
ANSWER:
13.
collegeaveragesuspectthatthenumberofcreditsearnedpersemesterbyResearchers
studentsisrising.AresearcheratMichiganStateUniversity(MSU)wishedtoestimate
thenumberofcreditsearnedbystudentsduringthefallsemesterof2003atMSU.Todo
eachcreditstheandrecordsnumberofstudentheso,randomlyselects500transcripts
semesterofthethestudentearnedinfallterm2003.Hefoundthataveragenumber
theinterestpopulationstudent.Theoftoper14.85completedcreditswascredits
researcheris
allMSUstudents
a.
allcollegestudentsinMichigan
b.allMSUstudentsenrolledinthefallsemesterof2003
c.allcollegestudentsinMichiganenrolledinthefallsemesterof2003d.c
ANSWER:
4ChapterOne
14.
Thecollectionandsummarizationofthegraduatedegreesandresearchareasofinterest
ofthefacultyintheUniversityofMichiganofaparticularacademicinstitutionisan
exampleof
a.inferentialstatistics
b.descriptivestatistics
c.aparameter
d.astatistic
ANSWER:
b
15.
Thosemethodsinvolvingthecollection,presentation,andcharacterizationofasetofdata
inordertoproperlydescribethevariousfeaturesofthatsetofdataarecalled
inferentialstatisticsa.thescientificmethodb.samplingmethodc.descriptivestatisticsd.d
ANSWER:
16.
Whichofthefollowingismostlikelyaparameterasopposedtoastatistic?
Theaveragescoreofthefirsttenstudentscompletinganassignmenta.
TheproportionoffemalesregisteredtovoteinKentCounty,Michigan
b.Theaverageheightof100studentsrandomlyselectedfromacommunitycollegec.TheproportionofcarsstoppedyesterdayonUS131thatwerecitedforspeedingd.b
ANSWER:
17.
trees.ofpineadultwayisunderinanationalforesttodeterminetheheightAstudy
reachingtreeattemptingtodeterminewhatfactorsaidainisSpecifically,thestudy
heightsgreaterthan50feettall.Itisestimatedthattheforestcontains32,000pinetrees.
andtreesselectedrandomlyadultpineheightsThestudyinvolvescollectingfrom500
analyzingtheresults.Thesampleinthestudyis
the500randomlyselectedadultpinetreesa.
the32,000adultpinetreesintheforestb.
alltheadultpinetreestallerthan50feetc.allpinetrees,ofanyageintheforestd.a
ANSWER:
18.
Theestimationofthepopulationaveragestudentexpenditureoneducationbasedonthe
sampleaverageexpenditureof1,000studentsisanexampleof
inferentialstatisticsa.
descriptivestatisticsb.aparameterc.astatisticd.a
ANSWER:
WhatIsStatistics?
5
TRUE/FALSEQUESTIONS
19.Whenthepurposeofthestatisticalinferenceistodrawaconclusionaboutapopulation,
thesignificancelevel,asameasureofreliability,measureshowfrequentlytheconclusion
willbecorrectinthelongrun.
ANSWER:
F
Asummarymeasurethatiscomputedfromasampletodescribeacharacteristicofthe20.
populationiscalledastatistic.
ANSWER:
T
Theconfidencelevelistheproportionoftimesthatanestimatingprocedurewillbewrong.21.
ANSWER:
F
Conclusionsandestimatesaboutapopulationbasedonsampledataarenotalwaysgoing22.
tobecorrect.Forthisreasonmeasuresofreliability,suchasthesignificancelevelandthe
confidencelevel,shouldbebuiltintothestatisticalinference.
ANSWER:
T
Auniversityemploys2500facultyandstaff.Toascertainhowthe23.employeesfeel
regardingahealthinsuranceplan,250oftheemployeesaresurveyed.Theproportionof
the250employeeswhofavorthehealthinsuranceplanisaparameter.
ANSWER:
F
Inasampleof400studentsinacollegeofbusiness,120ofthemor30%aremarketing24.
majors.The30%isanexampleofstatisticalinferenceasopposedtodescriptivestatistics.
ANSWER:
F
Twenty-fivepercentofasampleof200tennisplayersindicatedthattheirparentsdidnot25.
playtennis.Basedonthissample,weestimatethatthe25%figureholdsfortheparentsof
allprofessionaltennisplayers.Thisisanexampleofdescriptivestatisticsasopposedto
statisticalinference.
ANSWER:
F
26.Apopulationisthetotalityofitemsorthingsofinterestunderconsideration.
T
ANSWER:
27.Alocalcablesystemusingasampleof800subscribersestimatesthatfortypercentofits
ofamostfourtimesweek.Thisisanexampleatpremiumsubscriberswatchchannel
statisticalinferenceasopposedtodescriptivestatistics
ANSWER:
T
28.Astatisticisusuallyunobservablewhileaparameterisusuallyobservable.
FANSWER:
29.
Statisticalinferenceistheprocessofmakinganestimate,prediction,ordecisionabouta
populationbasedonsampledata.
6ChapterOne
ANSWER:
T
Asummarymeasurethatiscomputedfromapopulationiscalledaparameter.30.
ANSWER:
T
Asampleistheportionoftheuniversethatisselectedforanalysisandmakinginferences31.
aboutthepopulationfromwhichthesampleisselected.
ANSWER:
T
Asapopulationbecomeslarge,itisusuallybettertoobtainstatisticalinformationfrom32.
theentirepopulation.
ANSWER:
F
Astatisticisusuallyusedtoprovideanestimateforausuallyunobservedparameter.33.
ANSWER:
T
Asampleisalwaysagoodrepresentationofthetargetpopulation.34.
ANSWER:
F
Estimatingcharacteristicsofthepopulationisthemaingoalofdescriptivestatistics.35.
ANSWER:
F
WhatIsStatistics?
7
STATISTICALCONCEPTS&APPLIEDQUESTIONS
36.Instatistics,whatnamedowegivetoanumericalcharacteristicofasample?
ANSWER:
Statistic
Instatistics,whatnamedowegivetoanumericalcharacteristicofapopulation?
37.
ANSWER:
Parameter
Amanufacturerofchildrentoysclaimsthatlessthan3%ofhisproductsaredefective.38.
When500toysweredrawnfromalargeproductionrun,5%werefoundtobedefective.
a.Whatisthepopulationofinterest?
b.Whatisthesample?
c.Whatistheparameter?
d.Whatisthestatistic?
e.Doesthevalue3%refertotheparameterorthestati
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