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chap02TIFBSAFC5
CHAPTER2:
PRESENTINGDATAINTABLESANDCHARTS
TABLE2-1
Aninsurancecompanyevaluatesmanynumericalvariablesaboutapersonbeforedecidingonanappropriaterateforautomobileinsurance.Arepresentativefromalocalinsuranceagencyselectedarandomsampleofinsureddriversandrecorded,X,thenumberofclaimseachmadeinthelast3years,withthefollowingresults.
Xf
114
218
312
45
51
1.ReferringtoTable2-1,howmanydriversarerepresentedinthesample?
a）5
b）15
c）18
d）50
ANSWER:
d
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
frequencydistribution
2.ReferringtoTable2-1,howmanytotalclaimsarerepresentedinthesample?
a）15
b）50
c）111
d）250
ANSWER:
c
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
interpretation,frequencydistribution
3.Atypeofverticalbarchartinwhichthecategoriesareplottedinthedescendingrankorderofthemagnitudeoftheirfrequenciesiscalleda
a）contingencytable.
b）Paretodiagram.
c）dotplot.
d）piechart.
ANSWER:
b
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
Paretodiagram
TABLE2-2
Atameetingofinformationsystemsofficersforregionalofficesofanationalcompany,asurveywastakentodeterminethenumberofemployeestheofficerssuperviseintheoperationoftheirdepartments,whereXisthenumberofemployeesoverseenbyeachinformationsystemsofficer.
Xf_
17
25
311
48
59
4.ReferringtoTable2-2,howmanyregionalofficesarerepresentedinthesurveyresults?
a）5
b）11
c）15
d）40
ANSWER:
d
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
interpretation,frequencydistribution
5.ReferringtoTable2-2,acrossalloftheregionaloffices,howmanytotalemployeesweresupervisedbythosesurveyed?
a）15
b）40
c）127
d）200
ANSWER:
c
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
interpretation,frequencydistribution
6.Thewidthofeachbarinahistogramcorrespondstothe
a）differencesbetweentheboundariesoftheclass.
b）numberofobservationsineachclass.
c）midpointofeachclass.
d）percentageofobservationsineachclass.
ANSWER:
a
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
frequencydistribution
TABLE2-3
Everyspringsemester,theSchoolofBusinesscoordinateswithlocalbusinessleadersaluncheonforgraduatingseniors,theirfamilies,andfriends.Corporatesponsorshippaysforthelunchesofeachoftheseniors,butstudentshavetopurchaseticketstocoverthecostoflunchesservedtogueststheybringwiththem.Thefollowinghistogramrepresentstheattendanceattheseniorluncheon,whereXisthenumberofguestseachgraduatingseniorinvitedtotheluncheonandfisthenumberofgraduatingseniorsineachcategory.
7.ReferringtothehistogramfromTable2-3,howmanygraduatingseniorsattendedtheluncheon?
a）4
b）152
c）275
d）388
ANSWER:
c
TYPE:
MCDIFFICULTY:
Difficult
EXPLANATION:
Thenumberofgraduatingseniorsisthesumofallthefrequencies,f.
KEYWORDS:
interpretation,histogram
8.ReferringtothehistogramfromTable2-3,ifalltheticketspurchasedwereused,howmanyguestsattendedtheluncheon?
a）4
b）152
c）275
d）388
ANSWER:
d
TYPE:
MCDIFFICULTY:
Difficult
EXPLANATION:
Thetotalnumberofguestsis
KEYWORDS:
interpretation,histogram
9.AprofessorofeconomicsatasmallTexasuniversitywantedtodeterminewhatyearinschoolstudentsweretakinghistougheconomicscourse.Shownbelowisapiechartoftheresults.Whatpercentageoftheclasstookthecoursepriortoreachingtheirsenioryear?
a）14%
b）44%
c）54%
d）86%
ANSWER:
d
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
interpretation,piechart
10.Whenpolygonsorhistogramsareconstructed,whichaxismustshowthetruezeroor"origin"?
a）Thehorizontalaxis.
b）Theverticalaxis.
c）Boththehorizontalandverticalaxes.
d）Neitherthehorizontalnortheverticalaxis.
ANSWER:
b
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
polygon,histogram
11.Whenconstructingcharts,thefollowingisplottedattheclassmidpoints:
a）frequencyhistograms.
b）percentagepolygons.
c）cumulativerelativefrequencyogives.
d）Alloftheabove.
ANSWER:
b
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
percentagepolygon
TABLE2-4
Asurveywasconductedtodeterminehowpeopleratedthequalityofprogrammingavailableontelevision.Respondentswereaskedtoratetheoverallqualityfrom0（noqualityatall）to100（extremelygoodquality）.Thestem-and-leafdisplayofthedataisshownbelow.
StemLeaves
324
403478999
50112345
612566
701
8
92
12.ReferringtoTable2-4,whatpercentageoftherespondentsratedoveralltelevisionqualitywitharatingof80orabove?
a）0
b）4
c）96
d）100
ANSWER:
b
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
stem-and-leafdisplay,interpretation
13.ReferringtoTable2-4,whatpercentageoftherespondentsratedoveralltelevisionqualitywitharatingof50orbelow?
a）11
b）40
c）44
d）56
ANSWER:
c
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
stem-and-leafdisplay,interpretation
14.ReferringtoTable2-4,whatpercentageoftherespondentsratedoveralltelevisionqualitywitharatingbetween50and75?
a）11
b）40
c）44
d）56
ANSWER:
d
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
stem-and-leafdisplay,interpretation
TABLE2-5
Thefollowingarethedurationsinminutesofasampleoflong-distancephonecallsmadewithinthecontinentalUnitedStatesreportedbyonelong-distancecarrier.
Relative
Time（inMinutes）Frequency
0butlessthan50.37
5butlessthan100.22
10butlessthan150.15
15butlessthan200.10
20butlessthan250.07
25butlessthan300.07
30ormore0.02
15.ReferringtoTable2-5,whatisthewidthofeachclass?
a）1minute
b）5minutes
c）2%
d）100%
ANSWER:
b
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
classinterval,relativefrequencydistribution
16.ReferringtoTable2-5,if1,000callswererandomlysampled,howmanycallslastedunder10minutes?
a）220
b）370
c）410
d）590
ANSWER:
d
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
relativefrequencydistribution,interpretation
17.ReferringtoTable2-5,if100callswererandomlysampled,howmanycallslasted15minutesorlonger?
a）10
b）14
c）26
d）74
ANSWER:
c
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
relativefrequencydistribution,interpretation
18.ReferringtoTable2-5,if10callslasted30minutesormore,howmanycallslastedlessthan5minutes?
a）10
b）185
c）295
d）500
ANSWER:
b
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
relativefrequencydistribution,interpretation
19.ReferringtoTable2-5,whatisthecumulativerelativefrequencyforthepercentageofcallsthatlastedunder20minutes?
a）0.10
b）0.59
c）0.76
d）0.84
ANSWER:
d
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
cumulativerelativefrequency
20.ReferringtoTable2-5,whatisthecumulativerelativefrequencyforthepercentageofcallsthatlasted10minutesormore?
a）0.16
b）0.24
c）0.41
d）0.90
ANSWER:
c
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
cumulativerelativefrequency
21.ReferringtoTable2-5,if100callswererandomlysampled,_______ofthemwouldhavelastedatleast15minutesbutlessthan20minutes
a）0.10
b）0.16
c）10
d）16
ANSWER:
c
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
relativefrequencydistribution,interpretation
22.ReferringtoTable2-5,if100callsweresampled,_______ofthemwouldhavelastedlessthan15minutes.
a）26
b）74
c）10
d）Noneoftheabove.
ANSWER:
b
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
relativefrequencydistribution,interpretation
23.ReferringtoTable2-5,if100callsweresampled,_______ofthemwouldhavelasted20minutesormore.
a）26
b）16
c）74
d）Noneoftheabove.
ANSWER:
b
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
relativefrequencydistribution,interpretation
24.ReferringtoTable2-5,if100callsweresampled,_______ofthemwouldhavelastedlessthan5minutesoratleast30minutesormore.
a）35
b）37
c）39
d）Noneoftheabove.
ANSWER:
c
TYPE:
MCDIFFICULTY:
Difficult
KEYWORDS:
relativefrequencydistribution,interpretation
25.Whenstudyingthesimultaneousresponsestotwocategoricalquestions,weshouldsetupa
a）contingencytable.
b）frequencydistributiontable.
c）cumulativepercentagedistributiontable.
d）histogram.
ANSWER:
a
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
contingencytable
26.Dataon1,500students’heightwerecollectedatalargeruniversityintheEastCoast.Whichofthefollowingisthebestchartforpresentingtheinformation?
a）Apiechart.
b）AParetodiagram.
c）Ascatterplot.
d）Ahistogram.
ANSWER:
d
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
choiceofchart,histogram
27.Dataonthenumberofpart-timehoursstudentsatapublicuniversityworkedinaweekwerecollected.Whichofthefollowingisthebestchartforpresentingtheinformation?
a）Apiechart.
b）AParetodiagram.
c）Apercentagetable.
d）Apercentagepolygon.
ANSWER:
d
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
choiceofchart,percentagepolygon
28.Dataonthenumberofcredithoursof20,000studentsatapublicuniversityenrolledinaSpringsemesterwerecollected.Whichofthefollowingisthebestforpresentingtheinformation?
a）Apiechart.
b）AParetodiagram.
c）Astem-and-leafdisplay.
d）Acontingencytable.
ANSWER:
c
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
choiceofchart,stem-and-leaf
29.Asurveyof150executiveswereaskedwhattheythinkisthemostcommonmistakecandidatesmakeduringjobinterviews.Sixdifferentmistakesweregiven.Whichofthefollowingisthebestforpresentingtheinformation?
a）Abarchart.
b）Ahistogram
c）Astem-and-leafdisplay.
d）Acontingencytable.
ANSWER:
a
TYPE:
MCDIFFICULTY:
Ea
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