Elementary Statistics: Picturing the World, 7th Edition Test Bank

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Chapter1IntroductiontoStatistics1.1AnOverviewofStatistics1DistinguishBetweenaPopulationandaSampleMULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Determinewhetherthedatasetisapopulationorasample.1) TheageofeveryfourthpersonenteringadepartmentstoreA) sampleB) population2) TheageofeachemployeeatalocalgrocerystoreA) populationB) sampleSHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Identifythepopulationandthesample.3) Asurveyof1212Americanhouseholdsfoundthat52%ofthehouseholdsownacomputer.4) When1348Americanhouseholdsweresurveyed,itwasfoundthat57%ofthemownedtwocars.5) Asurveyof2625elementaryschoolchildrenfoundthat28%ofthechildrencouldbeclassifiedasobese.MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.UsetheVenndiagramtoidentifythepopulationandthesample.6)A) Population:Magazinesubscribers;Sample;MagazinesubscriberswhorenewtheirsubscriptionB) Population:Magazinesubscriberswhorenewtheirsubscription;Sample:Magazinesubscribers2DistinguishBetweenaParameterandaStatisticSHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Determinewhetherthenumericalvalueisaparameterorastatistic.Explainyourreasoning.7) Arecentsurveybythealumniofamajoruniversityindicatedthattheaveragesalaryof10,500ofits200,000graduateswas$130,000.8) Theaveragesalaryofallassembly-lineemployeesatacertaincarmanufactureris$44,000.9) Asurveyof1040studentswastakenfromauniversitywith19,000 students.Page1

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3DistinguishBetweenDescriptiveStatisticsandInferentialStatisticsMULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Identifywhetherthestatementdescribesinferentialstatisticsordescriptivestatistics.10) Theaverageageofthestudentsinastatisticsclassis20 years.A) descriptivestatisticsB) inferentialstatistics11) ThechancesofwinningtheCaliforniaLotteryareonechanceintwenty-twomillion.A) inferentialstatisticsB) descriptivestatistics12) Thereisarelationshipbetweensmokingcigarettesandgettingemphysema.A) inferentialstatisticsB) descriptivestatistics13) Frompastfigures,itispredictedthat31%oftheregisteredvotersinCaliforniawillvoteintheJuneprimary.A) inferentialstatisticsB) descriptivestatistics14) Basedonpreviousclients,amarriagecounselorconcludesthatthemajorityofmarriagesthatbeginwithcohabitationbeforemarriagewillresultindivorce.A) inferentialstatisticsB) descriptivestatistics4ConceptsSHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Provideanappropriateresponse.15) Explainthedifferencebetweenasampleandapopulation.16) Ifyouhadtodoastatisticalstudy,wouldyouuseasampleorapopulation?Why?1.2DataClassification1DistinguishBetweenQualitativeandQuantitativeDataMULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Determinewhetherthedataarequalitativeorquantitative.1) thecolorsofautomobilesonausedcarlotA) qualitativeB) quantitative2)thenumberofcomplaintlettersreceivedbytheUnitedStatesPostalServiceinagivendayA) quantitativeB) qualitative3) thenumberofseatsinamovietheaterA) quantitativeB) qualitative4) thenumbersontheshirtsofagirlʹssoccerteamA) qualitativeB) quantitative2ClassifyDatawithRespecttotheFourLevelsofMeasurementMULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Identifythedatasetʹslevelofmeasurement.5) haircolorofwomenonahighschooltennisteamA) nominalB) ordinalC) intervalD) ratioPage2

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6) numbersontheshirtsofagirlʹssoccerteamA) nominalB) ordinalC) intervalD) ratio7) agesofstudentsinastatisticclassA) ratioB) ordinalC) intervalD) nominal8) temperaturesof26selectedrefrigeratorsA) intervalB) ordinalC) nominalD) ratio9) numberofmilligramsoftarin30cigarettesA) ratioB) ordinalC) intervalD) nominal10) numberofpagesinyourstatisticsbookA) ratioB) ordinalC) intervalD) nominal11) marriagestatus(married,single,ordivorced)ofthefacultyattheUniversityofColoradoA) nominalB) ordinalC) intervalD) ratio12) listof1240socialsecuritynumbersA) nominalB) ordinalC) intervalD) ratio13) theratingsofamovierangingfromʺpoorʺtoʺgoodʺtoʺexcellentʺA) ordinalB) nominalC) intervalD) ratio14) thefinalgrades(A,B,C,D,andF)forstudentsinastatisticsclassA) ordinalB) nominalC) intervalD) ratio15) theannualsalariesforallteachersinCaliforniaA) ratioB) ordinalC) intervalD) nominal16) listofzipcodesforChicagoA) nominalB) ordinalC) intervalD) ratio17) thenationalitieslistedinarecentsurvey(forexample,Asian,European,orHispanic).A) nominalB) ordinalC) intervalD) ratio18) theamountsoffat(ingrams)in37cookiesA) ratioB) ordinalC) intervalD) nominal19) theyearsthesummerOlympicswereheldintheUnitedStatesA) intervalB) ordinalC) nominalD) ratio20) numbersoftouchdownsscoredbyamajoruniversityinfiverandomlyselectedgames53134A) ratioB) ordinalC) intervalD) nominal21) theaveragedailytemperatures(indegreesFahrenheit)onfiverandomlyselecteddays2123213027A) intervalB) nominalC) ordinalD) ratio22) manuscriptsratedʺacceptableʺorʺunacceptableʺA) ordinalB) nominalC) ratioD) intervalPage3

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23) thelengths(inminutes)ofthetoptenmovieswithrespecttoticketsalesin2007A) ratioB) nominalC) ordinalD) interval24) thedatalistedonthehorizontalaxisinthegraphA) nominalB) intervalC) ordinalD) ratio25) thedatalistedonthehorizontalaxisinthegraphA) ratioB) nominalC) ordinalD) interval3ConceptsSHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Provideanappropriateresponse.26) Explainthedifferencesbetweentheintervalandratiolevelsofmeasurement.27) ExplainwhydataexpressedwiththeCelsiustemperaturescaleisattheintervallevelofmeasurementratherthantheratiolevel.Page4

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1.3DataCollectionandExperimentalDesign1DecideWhetherStudyisObservationalStudyorExperimentMULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Determinewhetherthestudyisanobservationalstudyoranexperiment.1) Amedicalresearcherobtainsasampleofadultssufferingfromdiabetes.Sherandomlyassigns89 peopletoatreatmentgroupand89toaplacebogroup.Thetreatmentgroupreceivesamedicationoveraperiodofthreemonthsandtheplacebogroupreceivesaplacebooverthesametimeframe.Attheendofthreemonthsthepatientsʹsymptomsareevaluated.A) experimentB) observationalstudy2) Apollisconductedinwhichprofessionalmusiciansareaskedtheirages.A) observationalstudyB) experiment3) Apollsterobtainsasampleofstudentsandasksthemhowtheywillvoteonanupcomingreferendum.A) observationalstudyB) experiment4) Thepersonneldirectoratalargecompanywouldliketodeterminewhetherthecompanycafeteriaiswidelyusedbyemployees.Shecallseachemployeeandasksthemwhethertheyusuallybringtheirownlunch,eatatthecompanycafeteria,orgooutforlunch.A) observationalstudyB) experiment5) Ascientistwasstudyingtheeffectsofanewfertilizeroncropyield.Sherandomlyassignedhalfoftheplotsonafarmtogrouponeandtheremainingplotstogrouptwo.Ontheplotsingroupone,thenewfertilizerwasusedforayear.Ontheplotsingrouptwo,theoldfertilizerwasused.Attheendoftheyeartheaveragecropyieldfortheplotsingrouponewascomparedwiththeaveragecropyieldfortheplotsingrouptwo.A) experimentB) observationalstudy6) Aresearcherobtainedarandomsampleof100smokersandarandomsampleof100nonsmokers.Afterinterviewingall200participantsinthestudy,theresearchercomparedtherateofdepressionamongthesmokerswiththerateofdepressionamongnonsmokers.A) observationalstudyB) experimentSHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Identifytheexperimentalunitsandtreatmentsusedintheexperiment.7) Amedicalresearchercenterwantstotesttheeffectivenessofanewdiabetesmedication.Thecompanyidentifies98adultssufferingfromasimilarformofdiabetes.Thesubjectsarerandomlyassignedtotwogroups.Onegroupisgivenamedicationandtheotherisgivenaplacebothatlooksexactlylikethemedication.Afterthreemonths,thesubjectsʹsymptomsarestudiedandcompared.2IdentifyaBiasedSampleSHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Provideanappropriateresponse.8) Explainwhatbiasthereisinastudydoneentirelyonline.9) AreportsponsoredbytheCaliforniaCitrusCommissionstatedthatcholesterollevelscanbeloweredbydrinkingatleastoneglassofacitrusproducteachday.Determineifthereportisbiased.10) Alocalnewspaperranasurveybyasking,ʺDoyousupportthedeploymentofaweaponthatcouldkillmillionsofinnocentpeople?ʺDeterminewhetherthesurveyquestionisbiased.Page5

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3IdentifySamplingTechniquesMULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Identifythesamplingtechniqueused.11) Thirty-fivesophomores,30juniorsand33 seniorsarerandomlyselectedfrom281sophomores,242 juniorsand529seniorsatacertainhighschool.A) stratifiedB) randomC) clusterD) convenienceE) systematic12) Everyfifthpersonboardingaplaneissearchedthoroughly.A) systematicB) randomC) clusterD) convenienceE) stratified13) Atalocalcommunitycollege,fivestatisticsclassesarerandomlyselectedoutof20andallofthestudentsfromeachclassareinterviewed.A) clusterB) randomC) convenienceD) systematicE) stratified14) Aresearcherrandomlyselectsandinterviewsfiftymaleandfiftyfemaleteachers.A) stratifiedB) randomC) clusterD) convenienceE) systematic15) Aresearcherforanairlineinterviewsallofthepassengersonfiverandomlyselectedflights.A) clusterB) randomC) convenienceD) systematicE) stratified16) Acommunitycollegestudentinterviewseveryoneinaparticularstatisticsclasstodeterminethepercentageofstudentsthatownacar.A) convenienceB) randomC) clusterD) systematicE) stratified17) Basedon12,500responsesfrom36,500 questionnairessenttoitsalumni,amajoruniversityestimatedthattheannualsalaryofitsalumniwas$116,000peryear.A) randomB) stratifiedC) clusterD) convenienceE) systematic18) Inarecenttelevisionsurvey,participantswereaskedtoanswerʺyesʺorʺnoʺtothequestionʺAreyouinfavorofthedeathpenalty?ʺSixthousandfivehundredrespondedʺyesʺwhile4700respondedʺnoʺ.Therewasafifty-centchargeforthecall.A) convenienceB) randomC) clusterD) stratifiedE) systematic19) Alobbyistforamajorairspacefirmassignsanumbertoeachlegislatorandthenusesacomputertorandomlygeneratetennumbers.Thelobbyistcontactsthelegislatorscorrespondingtothesenumbers.A) randomB) convenienceC) clusterD) stratifiedE) systematic20) Toensurecustomersatisfaction,every20thphonecallreceivedbycustomerservicewillbemonitored.A) systematicB) randomC) clusterD) stratifiedE) convenience21) Amarketresearcherrandomlyselects400driversunder45 yearsofageand100driversover45 yearsofage.A) stratifiedB) randomC) clusterD) convenienceE) systematic22) Toavoidworkinglate,thequalitycontrolmanagerinspectsthelast60itemsproducedthatday.A) convenienceB) randomC) clusterD) stratifiedE) systematic23) Thenamesof70contestantsarewrittenon70cards.Thecardsareplacedinabag,andthreenamesarepickedfromthebag.A) randomB) stratifiedC) clusterD) convenienceE) systematic24) Aresearcherrandomlyselected70ofthenationʹsmiddleschoolsandinterviewedalloftheteachersateachschool.A) clusterB) randomC) stratifiedD) convenienceE) systematicPage6

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SHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Provideanappropriateresponse.25) Afterahurricane,adisasterareaisdividedinto200equalgrids.Thirtyofthegridsareselectedandeveryoccupiedhouseholdinthegridisinterviewedtohelpfocusreliefefforts.Selectthenumbersofthefirstfivegridsthatbelongtotheclustersample.163487693890169513925588771015092097915726) Thereare750incomingfreshmenattendingauniversitythisfall.Aresearcherwishestosendquestionnairestoasampleof30ofthemtocompleteregardingtheirdrinkinghabits.Selectthenumbersofthefirstfivefreshmenwhobelongtothesimplerandomsample.163487693890169513925588771015092097915727) Acollegeemploys85facultymembers.Withoutreplacement,selectthenumbersofthefivememberswhowillserveonthetenurecommitteenextyear.163487693890169513925588771015092097915728) Ofthe5000outpatientsreleasedfromalocalhospitalinthepastyear,onehundredwerecontactedandaskedtheiropiniononthecaretheyreceived.Selectthefirstfivepatientswhobelongtothesimplerandomsample.1634876938901695139255887710150920979157MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Determinewhetheryouwouldtakeacensusoruseasampling.Ifyouwoulduseasampling,decidewhatsamplingtechniqueyouwoulduse.29) Theaverageageofthe80residentsofanassistedlivingcenter.A) censusB) randomsamplingC) stratifiedsamplingD) clustersampling4ConceptsSHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Provideanappropriateresponse.30) Explainthedifferencesbetweenclustersamplingandstratifiedsampling.31) Explainthedifferencebetweenacensusandasamplinganddescribetheadvantagesanddisadvantagesofeach.Page7

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Chapter1IntroductiontoStatisticsAnswerKey1.1AnOverviewofStatistics1DistinguishBetweenaPopulationandaSample1) A2) A3) population:collectionofallAmericanhouseholds;sample:collectionof1212 Americanhouseholdssurveyed4) population:collectionofallAmericanhouseholds;sample:collectionof1348 Americanhouseholdssurveyed5) population:elementaryschoolchildren;sample:collectionof2625elementaryschoolchildrensurveyed.6) A2DistinguishBetweenaParameterandaStatistic7) Itdescribesastatisticbecausethenumber$130,000 isbasedonasubsetofthepopulation.8) Itdescribesaparameterbecausethe$44,000 isbasedonalltheworkersatthecarmanufacturer.9) Itdescribesastatisticbecausethenumber1040 isbasedonasubsetofthepopulation.3DistinguishBetweenDescriptiveStatisticsandInferentialStatistics10) A11) A12) A13) A14) A4Concepts15) Apopulationisthecollectionofalloutcomes,responses,measurements,orcountsthatareofinterest..Asampleisasubsetofapopulation.16) Asamplewouldbeused.Itisusuallyimpracticaltoobtainallthepopulationdata.1.2DataClassification1DistinguishBetweenQualitativeandQuantitativeData1) A2) A3) A4) A2ClassifyDatawithRespecttotheFourLevelsofMeasurement5) A6) A7) A8) A9) A10) A11) A12) A13) A14) A15) A16) A17) A18) A19) A20) A21) A22) A23) A24) A25) APage8

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3Concepts26) Dataattheratiolevelaresimilartodataattheintervallevel,butwiththeaddedpropertythatazeroentryisaninherentzero(impliesʺnoneʺ).Also,fordataattheratiolevelaratiooftwodatavaluescanbeformedsothatonedatavaluecanbeexpressedasamultipleofanother.27) Suchdataisattheintervallevelratherthantheratiolevelbecausethetemperatureof0°Cdoesnotrepresentaconditionwherenoheatispresent,soitisnotaninherentzeroasrequiredbytheratiolevel.Also,ratiosoftwotemperaturescannotbeformedsothatonedatavalueisexpressedasamultipleoftheother.Thetemperature2°Cisnottwiceaswarmas1°C.1.3DataCollectionandExperimentalDesign1DecideWhetherStudyisObservationalStudyorExperiment1) A2) A3) A4) A5) A6) A7) Theexperimentalunitsarethe98adultsinthestudy.Thetreatmentisthenewdiabetesmedication.2IdentifyaBiasedSample8) Thestudymaybebiasedbecauseitislimitedtopeoplewithcomputers.9) Areportsponsoredbythecitrusindustryismuchmorelikelytoreachconclusionsfavorabletotheindustry.10) Thewordingofthequestionisbiased,asittendstoencouragenegativeresponses.3IdentifySamplingTechniques11) A12) A13) A14) A15) A16) A17) A18) A19) A20) A21) A22) A23) A24) A25) 163,169,15,92,9726) 163,487,693,169,51327) 16,34,69,38,1328) 1634,3890,1695,1392,150929) A4Concepts30) Instratifiedsampling,membersofthepopulationaredividedintotwoormoresubsets,orstrata,thatshareasimilarcharacteristic.Asampleisthenrandomlyselectedfromeachofthestrata.Astratifiedsamplehasmembersfromeachsegmentofthepopulation.Inclustersampling,thepopulationisdividedintonaturallyoccurringsubgroups,eachhavingsimilarcharacteristics.Allofthemembersinoneormore(butnotall)oftheclustersarethenselected.Inaclustersample,caremustbetakentoensurethatallclustershavesimilarcharacteristics.31) Acensusisacountormeasureofanentirepopulation,whileasamplingisacountormeasureofpartofapopulation.Acensusprovidescompleteinformationbutisoftenexpensive,difficult,andtimeconsumingtoperformespeciallyifthepopulationislarge.Asamplingislessexpensiveandtimeconsuming,howeverappropriatesamplingtechniquesmustbeusedtoensurethatunbiaseddataarecollectedandthatthesampleisrepresentativeofthepopulation.Evenwiththebestsamplingmethods,samplingerrorcanoccur.Page9

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Chapter2DescriptiveStatistics2.1FrequencyDistributionsandTheirGraphs1InterpretaFrequencyDistributionMULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Usethegivenfrequencydistributiontofindthe(a)classwidth.(b)classmidpointsofthefirstclass.(c)classboundariesofthefirstclass.1)Height(ininches)ClassFrequency,f50-52553-55856-581259-611362-6411A) (a)3(b)51(c)49.5-52.5B) (a)2(b)51.5(c)49.5-52.5C) (a)3(b)51(c)50-52D) (a)2(b)51.5(c)50-522)PhoneCalls(perday)ClassFrequency,f8-111812-152316-193820-234724-2732A) (a)4(b)9.5(c)7.5-11.5B) (a)3(b)10.5(c)8-11C) (a)4(b)10.5(c)8-11D) (a)3(b)9.5(c)7.5-11.53)Weight(inpounds)ClassFrequency,f135-1396140-1444145-14911150-15415155-1598A) (a)5(b)137(c)134.5-139.5B) (a)5(b)137(c)135-139C) (a)4(b)137.5(c)134.5-139.5D) (a)4(b)137.5(c)135-139Page10

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4)Miles(perday)ClassFrequency,f1-293-4225-6287-8159-104A) (a)2(b)1.5(c)0.5-2.5B) (a)1(b)1.5(c)0.5-2.5C) (a)2(b)1(c)1-2D) (a)1(b)1(c)1-2SHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Usethemaximumandminimumdataentriesandthenumberofclassestofindtheclasswidth,thelowerclasslimits,andtheupperclasslimits.5) min=1,max=30,6classes6) min=80,max=265,6classes2InterpretFrequencyDistributionGraphsMULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Provideanappropriateresponse.7) Usetheogivebelowtoapproximatethenumberinthesample.A) 80B) 100C) 341D) 28Page11

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8) Usetheogivebelowtoapproximatethecumulativefrequencyfor24hours.A) 63B) 17C) 27D) 75SHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Usetherelativefrequencyhistogramtoa)identifytheclasswiththegreatest,andtheclasswiththeleast,relativefrequency.b)approximatethegreatestandleastrelativefrequencies.c)approximatetherelativefrequencyofthefifthclass.9)Usethegivenfrequencydistributiontoconstructafrequencyhistogram,arelativefrequencyhistogramandafrequencypolygon.10)Height(ininches)ClassFrequency,f50-52553-55856-581259-611362-6411Page12

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11)Weight(inpounds)ClassFrequency,f135-1396140-1444145-14911150-15415155-1598Usethegivenfrequencydistributiontoconstructacumulativefrequencydistributionandanogive.12)PhoneCalls(perday)ClassFrequency,f8-111812-152316-193820-234724-273213)Height(ininches)ClassFrequency,f50-52553-55856-581259-611362-641114)Weight(inpounds)ClassFrequency,f135-1396140-1444145-14911150-15415155-159815)Miles(perday)ClassFrequency,f1-293-4225-6287-8159-1043ConstructaFrequencyDistributionfromDataSetMULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Provideanappropriateresponse.16) AcityinthePacificNorthwestrecordeditshighesttemperatureat73 degreesFahrenheitanditslowesttemperatureat22degreesFahrenheitforaparticularyear.Usethisinformationtofindtheupperandlowerlimitsofthefirstclassifyouwishtoconstructafrequencydistributionwith10classes.A) 22-27B) 22-28C) 17-27D) 22-26Page13

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17) Asampleofcandieshaveweightsthatvaryfrom2.35gramsto4.75grams.Usethisinformationtofindtheupperandlowerlimitsofthefirstclassifyouwishtoconstructafrequencydistributionwith12classes.A) 2.35-2.55B) 2.35-2.54C) 2.35-2.65D) 2.35-2.75SHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Thegradepointaveragesfor40studentsarelistedbelow.2.03.21.82.90.94.03.32.93.60.83.12.42.42.31.61.64.03.13.21.82.22.21.70.53.63.41.92.03.01.13.04.04.02.11.91.10.53.23.02.218)Constructafrequencydistribution,arelativefrequencydistribution,andacumulativefrequencydistributionusingeightclasses.Includethemidpointsoftheclasses.19) Constructafrequencyhistogram,arelativefrequencyhistogramandafrequencypolygonusingeightclasses.20) Constructanogiveusingeightclasses.Theheights(ininches)of30adultmalesarelistedbelow.70727170697369687071677170746968717171726971686773747071696821) Constructafrequencydistribution,arelativefrequencydistribution,andacumulativefrequencydistributionusingfiveclasses.22) Constructafrequencyhistogramusingfiveclasses.23) Constructarelativefrequencyhistogramusingfiveclasses.24) Constructafrequencypolygonusingfiveclasses.25) Constructaogiveusingfiveclasses.TheHighwayPatrol,usingradar,checkedthespeeds(inmph)of30passingmotoristsatacheckpoint.Theresultsarelistedbelow.44384150363643424948354037414350454539385041473635404243483326) Constructafrequencydistribution,arelativefrequencydistribution,andacumulativefrequencydistributionusingsixclasses.27) Constructafrequencyhistogram,arelativefrequencyhistogramandafrequencypolygonusingsixclasses.28) Constructanogiveusingsixclasses.Page14

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Provideanappropriateresponse.29) ListedbelowaretheACTscoresof40randomlyselectedstudentsatamajoruniversity.18221315242420191912162514192123251818132626252519171815132119191424202123221917a)Constructarelativefrequencyhistogramofthedata,usingeightclasses.b)Iftheuniversitywantstoacceptthetop90%oftheapplicants,whatshouldtheminimumscorebe?c)Iftheuniversitysetstheminimumscoreat17,whatpercentoftheapplicantswillbeaccepted?4ConceptsSHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Provideanappropriateresponse.30) Explainthedifferencebetweenclasslimitsandclassboundaries.2.2MoreGraphsandDisplays1InterpretDataSetsMULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Matchthedescriptionofthesamplewiththecorrectplot.1) Time(inminutes)ittakesasampleofemployeestodrivetoworkA)B)C) Key:0 9=0.9012349493678015680D) Key:7 2=72678989023367824567780115SHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.Provideanappropriateresponse.2) ThenumbersofhomerunsthatSammySosahitinthefirst15yearsofhismajorleaguebaseballcareerarelistedbelow.Makeastem-and-leafplotforthisdata.Whatcanyouconcludeaboutthedata?41510833253640366663506449403) ThenumbersofhomerunsthatBarryBondshitinthefirst18yearsofhismajorleaguebaseballcareerarelistedbelow.Makeastem-and-leafplotforthisdata.Whatcanyouconcludeaboutthedata?162524193325344637334240373449734645Page15

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