Business Stats Chapter 1.docx
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Business Stats Chapter 1.docx
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BusinessStatsChapter1
Chapter1
WhatisStatistics?
True/FalseQuestions
TF1.Apopulationisacollectionofallindividuals,objects,ormeasurementsofinterest.
Answer:
TrueDifficulty:
EasyGoal:
2
TF2.Asampleisaportionorpartofthepopulationofinterest.
Answer:
TrueDifficulty:
EasyGoal:
2
TF3.Toinfersomethingaboutapopulation,weusuallytakeasamplefromthepopulation.
Answer:
TrueDifficulty:
EasyGoal:
2
TF4.Thetechniquesusedtofindoutsomethingaboutapopulation,suchastheiraverageweight,basedonasamplearereferredtoasdescriptivestatistics.
Answer:
FalseDifficulty:
EasyGoal:
2
TF5.Mutuallyexclusiveindicatesthatanindividual,object,ormeasurementisincludedinonlyonecategory.
Answer:
TrueDifficulty:
EasyGoal:
6
TF6.Therearefourlevelsofmeasurement-qualitative,quantitative,discrete,andcontinuous.
Answer:
FalseDifficulty:
EasyGoal:
5
TF7.Exhaustivemeansthateachindividual,object,ormeasurementfromasampleorpopulationmustappearinatleastonecategory.
Answer:
TrueDifficulty:
EasyGoal:
6
TF8.Ordinallevelofmeasurementisconsideredthe"lowest"levelofmeasurement.
Answer:
FalseDifficulty:
EasyGoal:
5
TF9.Astoreasksshoppersfortheirzipcodetoidentifymarketareas.Zipcodesareanexampleofratiodata.
Answer:
FalseDifficulty:
EasyGoal:
5
TF10.Ordinallevelofmeasurementimpliessomesortofranking.
Answer:
TrueDifficulty:
EasyGoal:
5
TF11.Datathatcanonlybeclassifiedintocategoriesisnominaldata.
Answer:
TrueDifficulty:
EasyGoal:
5
TF12.Thewordsdescriptivestatisticsandinferentialstatisticscanbeusedinterchangeably.
Answer:
FalseDifficulty:
EasyGoal:
2
TF13.AmarketingresearchagencywashiredtotestanewDVDplayer.Consumersrateditoutstanding,verygood,fairorpoor.Thelevelofmeasurementforthisexperimentisordinal.
Answer:
TrueDifficulty:
EasyGoal:
5
TF14.TheUnionofElectricalWorkersofAmericawith9,128memberspolled362membersregardinganewwagepackagetobesubmittedtomanagement.Since362membersissolarge,itisthepopulation.
Answer:
FalseDifficulty:
EasyGoal:
2
TF15.TheCIAWorldFactbookcitedthesenumbersfortheU.S:
∙Birthrateis14.14birthsper1,000population
∙Averagelifeexpectancyforfemalesis80years
∙Approximately290millionpersonsresidingintheUnitedStates
Eachofthesenumbersisreferredtoasstatistic.
Answer:
TrueDifficulty:
EasyGoal:
1
TF16.Ifweselect100personsoutof25,000registeredvotersandquestionthemaboutcandidatesandissues,the100personsarereferredtoasthepopulation.
Answer:
FalseDifficulty:
EasyGoal:
2
TF17.Statisticsisdefinedasabodyoftechniquesusedtofacilitatethecollection,organization,presentation,analysisandinterpretationofinformationforthepurposeofmakingbetterdecisions.
Answer:
TrueDifficulty:
EasyGoal:
1
TF18.Anothernameforinductivestatisticsisdescriptivestatistics.
Answer:
FalseDifficulty:
EasyGoal:
2
TF19.CategorizingvotersasDemocrats,RepublicansandIndependentsisanexampleofintervallevelmeasurement.
Answer:
FalseDifficulty:
EasyGoal:
5
TF20.Theorderthatrunnersfinishinaracewouldbeanexampleofcontinuousdata.
Answer:
FalseDifficulty:
MediumGoal:
4
TF21.Basedonasampleof3,000people,thecivilianunemploymentrateintheUnitedStateswas5.5%.5.5%isreferredtoasastatistic.
Answer:
TrueDifficulty:
EasyGoal:
1
TF22.Theprincipaldifferencebetweentheintervalandratioscaleisthattheratioscalehasameaningfulzeropoint.
Answer:
TrueDifficulty:
MediumGoal:
5
TF23.Thebranchofmathematicsusedtofacilitatethecollection,organization,presentation,analysisandinterpretationofnumericaldataisreferredtoasastatistic.
Answer:
FalseDifficulty:
EasyGoal:
1
TF24.Thenumberofchildreninafamilyisadiscretevariable.
Answer:
TrueDifficulty:
EasyGoal:
5
MultipleChoiceQuestions
25.Themainpurposeofdescriptivestatisticsisto:
A)Summarizedatainausefulandinformativemanner.
B)Makeinferencesaboutapopulation.
C)Determineifthedataadequatelyrepresentsthepopulation.
D)Gatherorcollectdata.
Answer:
ADifficulty:
EasyGoal:
2
26.Whichofthefollowingisanexampleofacontinuousvariable?
A)Familyincome
B)Numberofstudentsinastatisticsclass
C)Zipcodesofshoppers
D)Rankingsofbaseballteamsinaleague
E)Noneoftheabove
Answer:
ADifficulty:
EasyGoal:
4
27.Theincomesofagroupof50loanapplicantsareobtained.Whichlevelofmeasurementisincome?
A)Nominal
B)Ordinal
C)Interval
D)Ratio
E)Noneoftheabove
Answer:
DDifficulty:
EasyGoal:
5
28.WhenTVadvertisementsreportthat"2outof3dentistssurveyedindicatedtheywouldrecommendBrandXtoothpastetotheirpatients,"aninformedconsumermayquestiontheconclusionbecause:
A)Thesamplewasonly5dentists.
B)Thesampleofdentistsisclearlyexplained.
C)Theadvertisementdoesnotincludethetotalnumberofdentistssurveyed.
D)Theconclusionisnotillustratedwithagraph
Answer:
CDifficulty:
MediumGoal:
2
29.Abankaskscustomerstoevaluatethedrive-thruserviceasgood,average,orpoor.Whichlevelofmeasurementisthisclassification?
A)Nominal
B)Ordinal
C)Interval
D)Ratio
E)Noneoftheabove
Answer:
BDifficulty:
EasyGoal:
5
30.Whatisaportionorpartofapopulationcalled?
A)Randomsurvey
B)Sample
C)Tally
D)Frequencydistribution
E)Noneoftheabove
Answer:
BDifficulty:
EasyGoal:
2
31.Astudentwasstudyingthepoliticalpartypreferencesofauniversity'sstudentpopulation.Thesurveyinstrumentaskedstudentstoidentifythemselvesasademocratorarepublican.Thisquestionisflawedbecause:
A)Studentsgenerallydon'tknowtheirpoliticalpreferences.
B)Thecategoriesaregenerallymutuallyexclusive.
C)Thecategoriesarenotexhaustive.
D)Politicalpreferenceisacontinuousvariable.
Answer:
CDifficulty:
MediumGoal:
6
32.IfGallup,Harrisandotherpollstersaskedpeopletoindicatetheirpoliticalpartyaffiliation-Democrat,RepublicanorIndependent,thedatagatheredwouldbeanexampleofwhichscaleofmeasurement?
A)Nominal
B)Ordinal
C)Interval
D)Ratio
E)Noneoftheabove
Answer:
ADifficulty:
EasyGoal:
5
33.Themembersofeachbasketballteamwearnumbersonthebackoftheirjerseys.Whatscaleofmeasurementarethesenumbersconsidered?
A)Nominal
B)Ordinal
C)Interval
D)Ratio
E)Noneoftheabove
Answer:
ADifficulty:
EasyGoal:
5
34.Amarketingclassof50studentsevaluatedtheinstructorusingthefollowingscale:
superior,good,average,poor,andinferior.Thedescriptivesummaryshowedthefollowingsurveyresults:
2%superior,8%good,45%average,45%poor,and0%inferior.
A)Theinstructor'sperformancewasgreat!
!
!
B)Theinstructor'sperformancewasinferior.
C)Moststudentsratedtheinstructoraspoororaverage.
D)Noconclusionscanbemade.
Answer:
CDifficulty:
MediumGoal:
2
35.Aquestionnairecontainedaquestionregardingmaritalstatus.Therespondentcheckedeithersingle,married,divorced,separatedorwidowed.Whatisthescaleofmeasurementforthisquestion?
A)Ratio
B)Interval
C)Ordinal
D)Nominal
E)Noneoftheabove
Answer:
DDifficulty:
EasyGoal:
5
36.Respondentswereasked,"Doyounowearnmorethanorlessthanyoudidfiveyearsago?
"Whatisthislevelofmeasurement?
A)Interval
B)Ratio
C)Nominal
D)Ordinal
E)Noneoftheabove
Answer:
DDifficulty:
MediumGoal:
5
37.WhichwordisNOTpartofthedefinitionofdescriptivestatistics?
A)Organizing
B)Analyzing
C)Presenting
D)Predicting
E)Noneoftheabove
Answer:
DDifficulty:
MediumGoal:
2
38.Thereportedunemploymentis5.5%ofthepopulation.Whattypeofscaleisusedtomeasureunemployment?
A)Nominal
B)Ordinal
C)Intervalorratio
D)Descriptive
E)Noneoftheabove
Answer:
CDifficulty:
MediumGoal:
5
39.TheEqualEmploymentOpportunityActrequiresemployerstoclassifytheiremployeesbygenderandnationalorigin.Whichlevelofmeasurementisthis?
A)Nominal
B)Ordinal
C)Interval
D)Ratio
E)Noneoftheabove
Answer:
ADifficulty:
EasyGoal:
5
40.WhatlevelofmeasurementaretheCentigradeandFahrenheittemperaturescales?
A)Nominal
B)Ordinal
C)Interval
D)Ratio
E)Noneoftheabove
Answer:
CDifficulty:
MediumGoal:
5
41.Whattypeofvariableisthenumberofgallonsofgasolinepumpedbyafillingstationduringaday?
A)Qualitative
B)Continuous
C)Attribute
D)Discrete
E)Noneoftheabove
Answer:
BDifficulty:
MediumGoal:
3
42.Whattypeofvariableis"projectedreturnonaninvestment"?
A)Qualitative
B)Continuous
C)Attribute
D)Discrete
E)Noneoftheabove
Answer:
BDifficulty:
MediumGoal:
3
43.Whattypeofvariableisthenumberofrobberiesreportedinyourcity?
A)Attribute
B)Continuous
C)Discrete
D)Qualitative
E)Noneoftheabove
Answer:
CDifficulty:
MediumGoal:
3
44.Whatlevelofmeasurementisthenumberofautoaccidentsreportedinagivenmonth?
A)Nominal
B)Ordinal
C)Interval
D)Ratio
E)Noneoftheabove
Answer:
DDifficulty:
MediumGoal:
5
45.Thenamesofthepositionsonahockeyteam,suchasforwarda
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