, ONLINE
TEST BANK
STATISTICAL REASONING
FOR EVERYDAY LIFE
FIFTH EDITION
Jeffrey Bennett
University of Colorado at Boulder
William L. Briggs
University of Colorado at Denver
Mario F. Triola
Dutchess Community College
,Contents
Chapter 1 Speaking of Statistics ...................................................................................... 1
Chapter 2 Measurement in Statistics ............................................................................. 13
Chapter 3 Visual Displays of Data ................................................................................ 21
Chapter 4 Describing Data............................................................................................. 44
Chapter 5 A Normal World ........................................................................................... 63
Chapter 6 Probability in Statistics ................................................................................. 71
Chapter 7 Correlation and Causality.............................................................................. 83
Chapter 8 Inferences from Samples to Populations ..................................................... 100
Chapter 9 Hypothesis Testing...................................................................................... 108
Chapter 10 t Tests, Two-Way Tables, and ANOVA ................................................... 123
Answers ........................................................................................................................... 135
iii
,Statistical Reasoning for Everyday Life
Chapter 1 (Speaking of Statistics) Exam, form A
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or
answers the question.
For problems 1 and 2, determine whether the evaluated group is a population or a sample.
1) Thefiaveragefi(mean)fiagefioffiallfi63fiAssociatefiProfessorsfiatfiClifftonfiUniversityfiisfi47fiyears.
A) Population B)fiSample
2) Afiresearcherfiexaminesfithefipropertyfitaxfirecordsfioffi84fipropertyfiownersfiinfioneficityfiandfifindsfithatfi17
%fiarefibehindfiinfitheirfitaxfipayments.
A) Population B)fiSample
For problems 3 and 4, determine whether the given value is a statistic or a parameter.
3) Thefiaveragefi(mean)fiagefioffiallfi63fiAssociatefiProfessorsfiatfiClifftonfiUniversityfiisfi47fiyears.
A) Statistic B)fiParameter
4) Afiresearcherfiexaminesfithefipropertyfitaxfirecordsfioffi84fipropertyfiownersfiinfioneficityfiandfifindsfithatfi17
%fiarefibehindfiinfitheirfitaxfipayments.
A) Statistic B)fiParameter
5) FollowingfithefiRepublicanfiNationalfiConvention,fiafipollfioffi600fivotersfiinfiaficentralfiIllinoisficommunity
fishowed fithatfi57%fiexpectedfithefiRepublicanfiticketfito fiwinfioverfithefiDemocrat fiticket finofimatterfiwhomfit
hefiDemocratsfichosefiforfivice-
president.fiThefimarginfioffierrorfiwasfi4fipercentagefipoints.fiTherefiarefi25,000firegisteredfivotersfiinfithefic
ommunity.fiWhichfirangefioffivaluesfiisfilikelyfitoficontainfithefipopulationfiparameter?
A) 13,250fitofi15,250 B)fi24,400fitofi25,600
C)fi318fitofi366 D)fi53%fitofi61%
6) Afipollfioffi488ficitizensfioffiNormal,fiIllinois,fishowedfithatfi65%fifavoredfistrictfienforcementfioffispeedfilimit
sfiwithfiafimarginfioffierrorfioffi4%.fiAfisecondfipollfioffi495ficitizensfioffithefisamefitownfishowedfithatfi34%fifavo
redfistrictfienforcementfioffispeedfilimits.fiAssumingfithatfiproperfisamplingfitechniquesfiwerefiusedfiinfibothfi
polls,fionefimayficoncludefithat
A) thefipercentfioffithefipopulationfithatfifavorsfistrictfienforcementfioffispeedfilimitsfiisfi49.5%fifi8%.
B) thefipercentfioffithefipopulationfithatfifavorsfistrictfienforcementfioffispeedfilimitsfiisfi49.5%fifi4%.
C) onefiorfibothfioffithefisamplesfimayfihavefibeenfiunlikelyfisamplesfifromfithefipopulation.
D) thefipercentfioffithefipopulationfithatfifavorsfistrictfienforcementfioffispeedfilimitsfiisfi65%fifi8%.
7) Afipollfioffi700fiattendeesfioffithefiTastefioffiChicagofishowedfithatfi445fiattendees,fi65%fioffithefisample,fibeli
evedfithatfithefifoodfiwasfioverpriced.fiItfiisfiestimatedfithatfi1,250,000fipeoplefiattendfithefiTaste.fiAlthoughfi6
5%fiplusfiorfiminusfi5%fioffiattendeesfibelievefithatfithefifoodfiisfioverpriced,fithefiTastefiisfiafipopularfievent.fi
Thefirawfidatafioffithefistudyfiisfi(are)
A) 65%fioffithefisample.
B) 700fiattendees,fi455fiattendees.
C) 1,250,000fiattendees,fi700fiattendees,fi455fiattendees.
D) (60%,fi70%)
8) Afistudentfiwantedfitofiknowfithefifavoritefilunchfiatfiafilargefihighfischoolfiwithfiaficlosedficampus.fiWhatfiisfit
hefifirstfistepfiinficonductingfiafistatisticalfistudyfitofianswerfithefiquestion?
A) Selectfiafirandomfisamplefioffistudents.
B) Preciselyfistatefithefigoalfioffithefistudy.
C) Selectfiafirandomfisamplefioffistudentsfiandfiteachers.
D) Selectfiafirandomfisamplefioffiteachers.
1
.
,For problems 9 and 10, determine whether the statement is based on census data or sample
data.
9) Thefiaveragefi(mean)fiagefioffiallfi63fiAssociatefiProfessorsfiatfiClifftonfiUniversityfiisfi47fiyears.
A) Censusfidata B)fiSamplefidata
10) Afiresearcherfideterminesfithatfi17%fioffi84fipropertyfiownersfiinfiafilargeficityfiarefibehindfiinfitheirfita
xfipayments.
A) Censusfidata B)fiSamplefidata
For problems 11 and 12, select the most representative sample of the population of interest.
11) Aficollegefistudentfiwhofidoesfilaundryfiinfrequentlyfiwantsfitofideterminefithefieffectfioffistainfiremoverfio
nfiwhatfishouldfibefiwhiteficlothes.
A) Reportsfioffitwofifriends,fionefioffiwhomfiwasfigivenfistainfiremover.
B) Thefireportsfioffianfiinternetfichatroomfionfilaundryfitechniques.
C) Twofiloadsfioffipersonalfiwash,fionefiwith,fionefiwithoutfistainfiremover.
D) Twofiloadsfioffiwash,fionefipersonal,fionefioffiafifriend,fithefistainfiremoverfiassignedfibyfiaficoinfiflip.
12) Thefifatherfioffiafijuniorfihighfischoolfistudentfiwantsfitofideterminefithefimostfipopularfibookfiamongfijuniorfihig
hfistudents.fiSelectfithefisamplefiwithfithefileastfipotentialfibias.
A) Afirandomlyfiselectedfigroupfioffi10fibookfisellers
B) Afirandomlyfiselectedfigroupfioffi30fijuniorfihighfistudents
C) Afirandomlyfiselectedfigroupfioffi30fijuniorfihighfistudentsfileavingfithefipublicfilibrary
D) Thefigroupfioffi30fijuniorfihighfistudentsfiattendingfithefibirthdayfipartyfioffithefiresearcher’sfichild
For problems 13 and 14, identify the sampling technique that was used.
13) Afisampleficonsistsfioffieveryfi49thfistudentfifromfiafigroupfioffi496fistudents.
A) Systematic
B) Cluster
C) Convenience
D) Random
E) Stratified
14) Tofiavoidfiworkingfilate,fiafiquality-controlfianalystfisimplyfiinspectsfithefifirstfi100fiitemsfiproducedfiinfiafiday.
A) Systematic
B) Cluster
C) Convenience
D) Random
E) Stratified
For problems 15 and 16, determine whether the study is experimental or observational?
15) Afimarketingfifirmfidoesfiafisurveyfitofifindfioutfihowfimanyfipeoplefiusefiafiproduct.fiOffithefi100fipeop
leficontacted,fi15fisaidfitheyfiusefithefiproduct.
A) Observational B)fiExperimental
16) Twofisamplesfioffifishfiarefitakenfifromfiafiriverfiupstreamfiandfidownstreamfioffiafifactoryfitofimeasurefithefieffe
ctfioffipollutionfifromfithefifactoryfionfithefifish.
A) Observational B)fiExperimental
2
.
, 17) Afinutritionistfiwantsfitoficonductfiafistudyfitofivalidatefithefiefficacyfioffianfiherbfiasfianfiaidfiinfiweightfiloss.fiS
hefirandomlyfiassignsfihalffioffiafigroupfioffioverweightfipeoplefitofiafitreatmentfigroupfiwhofiarefigivenfithefiher
bfiwithfiinstructionsfiforfiitsfiusefiandfiafiplannedfidietfiforfisixfiweeks.fiThefiotherfihalffioffithefigroupfiisfigivenfi
parsleyfiwithfithefisamefiinstructionsfiandfisamefidiet.fiAfinursefiatfithefinutritionficenterfiweighsfieachfisubjectfio
nfiFridayfioffieachfiweek.fiSelectfithefipotentialfisourcefiofficonfounding.
A) Thefiplacebofieffect
B) Experimenterfieffect
C) Methodfioffiassignmentfitofitreatmentfiandficontrolfigroups
D) Thefistudyfiisfiessentiallyfifreefioffipotentialficonfounding.
18) Selectfithefimostfiappropriatefitypefioffistudyfiforfithefiquestion:fiWhichfiisfithefibestfifertilizerfiforfiMr.fiJimenez
’sfibackyardfigrass?
A) Experimental B)fiExperimentalfiblinded
C)fiDouble-blind D)fiObservational
19) Whichfidatafiprovidefithefianswerfitofithefiquestion:fi“HowfimanyfitimesfiafiweekfidofistudentsfiatfiEurek
afiCollegefistudyfimorefithanfithreefihoursfiafiday?”
A) Offi100fistudentsfisurveyed,fi43fireportedfithatfitheyfistudyfiatfileastfithreefihoursfiafidayfionfiSaturdaysfian
dfiSundays.
B) Offi100fistudentsfisurveyed,fi43fireportedfithatfitheyfihavefistudiedfiatfileastfithreefihoursfiafiday.
C) Offi100fistudentsfisurveyed,fi43fireportedfithatfitheyfistudiedfiatfileastfithreefihoursfiafidayfitwicefilastfiweek.
D) Offi100fistudentsfisurveyed,fi43fireportedfithatfitheyfiintendfitofistudyfiatfileastfithreefihoursfiafidayfine
xtfiweek.
20) Determinefiwhichfievaluationfiguidelinefiappliesfibestfiinfiquestioningfithefiresultsfioffithefidescribedfistudy:
Afihomeownerfiputfiafibrand-
namefifertilizer/weedfikillerfionfihalffioffihisfilawnfiandfiafigenericfifertilizer/weedfikillerfionfithefiotherfihalf.fiA
fterfithreefiweeks,fithefigenericfisidefihadfi1fiweedfiperfisquarefimeter,fithefiotherfisidefihadfi1.7fiweedsfiperfisquar
efimeter.fiThefigenericfisidefirequiredfitwofimowingsfiinfithefi3fiweeks,fithefibrand-
finamefisidefione.fiThefihomeownerficoncludedfithat fithefigenericfi wasfisuperiorfitofithefibrandfiname.
A) Considerfipossibleficonfoundingfivariables.
B) Considerfithefisample.
C) Considerfithefitypefioffistudy.
D) Considerfithefisource.
3
.
TEST BANK
STATISTICAL REASONING
FOR EVERYDAY LIFE
FIFTH EDITION
Jeffrey Bennett
University of Colorado at Boulder
William L. Briggs
University of Colorado at Denver
Mario F. Triola
Dutchess Community College
,Contents
Chapter 1 Speaking of Statistics ...................................................................................... 1
Chapter 2 Measurement in Statistics ............................................................................. 13
Chapter 3 Visual Displays of Data ................................................................................ 21
Chapter 4 Describing Data............................................................................................. 44
Chapter 5 A Normal World ........................................................................................... 63
Chapter 6 Probability in Statistics ................................................................................. 71
Chapter 7 Correlation and Causality.............................................................................. 83
Chapter 8 Inferences from Samples to Populations ..................................................... 100
Chapter 9 Hypothesis Testing...................................................................................... 108
Chapter 10 t Tests, Two-Way Tables, and ANOVA ................................................... 123
Answers ........................................................................................................................... 135
iii
,Statistical Reasoning for Everyday Life
Chapter 1 (Speaking of Statistics) Exam, form A
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or
answers the question.
For problems 1 and 2, determine whether the evaluated group is a population or a sample.
1) Thefiaveragefi(mean)fiagefioffiallfi63fiAssociatefiProfessorsfiatfiClifftonfiUniversityfiisfi47fiyears.
A) Population B)fiSample
2) Afiresearcherfiexaminesfithefipropertyfitaxfirecordsfioffi84fipropertyfiownersfiinfioneficityfiandfifindsfithatfi17
%fiarefibehindfiinfitheirfitaxfipayments.
A) Population B)fiSample
For problems 3 and 4, determine whether the given value is a statistic or a parameter.
3) Thefiaveragefi(mean)fiagefioffiallfi63fiAssociatefiProfessorsfiatfiClifftonfiUniversityfiisfi47fiyears.
A) Statistic B)fiParameter
4) Afiresearcherfiexaminesfithefipropertyfitaxfirecordsfioffi84fipropertyfiownersfiinfioneficityfiandfifindsfithatfi17
%fiarefibehindfiinfitheirfitaxfipayments.
A) Statistic B)fiParameter
5) FollowingfithefiRepublicanfiNationalfiConvention,fiafipollfioffi600fivotersfiinfiaficentralfiIllinoisficommunity
fishowed fithatfi57%fiexpectedfithefiRepublicanfiticketfito fiwinfioverfithefiDemocrat fiticket finofimatterfiwhomfit
hefiDemocratsfichosefiforfivice-
president.fiThefimarginfioffierrorfiwasfi4fipercentagefipoints.fiTherefiarefi25,000firegisteredfivotersfiinfithefic
ommunity.fiWhichfirangefioffivaluesfiisfilikelyfitoficontainfithefipopulationfiparameter?
A) 13,250fitofi15,250 B)fi24,400fitofi25,600
C)fi318fitofi366 D)fi53%fitofi61%
6) Afipollfioffi488ficitizensfioffiNormal,fiIllinois,fishowedfithatfi65%fifavoredfistrictfienforcementfioffispeedfilimit
sfiwithfiafimarginfioffierrorfioffi4%.fiAfisecondfipollfioffi495ficitizensfioffithefisamefitownfishowedfithatfi34%fifavo
redfistrictfienforcementfioffispeedfilimits.fiAssumingfithatfiproperfisamplingfitechniquesfiwerefiusedfiinfibothfi
polls,fionefimayficoncludefithat
A) thefipercentfioffithefipopulationfithatfifavorsfistrictfienforcementfioffispeedfilimitsfiisfi49.5%fifi8%.
B) thefipercentfioffithefipopulationfithatfifavorsfistrictfienforcementfioffispeedfilimitsfiisfi49.5%fifi4%.
C) onefiorfibothfioffithefisamplesfimayfihavefibeenfiunlikelyfisamplesfifromfithefipopulation.
D) thefipercentfioffithefipopulationfithatfifavorsfistrictfienforcementfioffispeedfilimitsfiisfi65%fifi8%.
7) Afipollfioffi700fiattendeesfioffithefiTastefioffiChicagofishowedfithatfi445fiattendees,fi65%fioffithefisample,fibeli
evedfithatfithefifoodfiwasfioverpriced.fiItfiisfiestimatedfithatfi1,250,000fipeoplefiattendfithefiTaste.fiAlthoughfi6
5%fiplusfiorfiminusfi5%fioffiattendeesfibelievefithatfithefifoodfiisfioverpriced,fithefiTastefiisfiafipopularfievent.fi
Thefirawfidatafioffithefistudyfiisfi(are)
A) 65%fioffithefisample.
B) 700fiattendees,fi455fiattendees.
C) 1,250,000fiattendees,fi700fiattendees,fi455fiattendees.
D) (60%,fi70%)
8) Afistudentfiwantedfitofiknowfithefifavoritefilunchfiatfiafilargefihighfischoolfiwithfiaficlosedficampus.fiWhatfiisfit
hefifirstfistepfiinficonductingfiafistatisticalfistudyfitofianswerfithefiquestion?
A) Selectfiafirandomfisamplefioffistudents.
B) Preciselyfistatefithefigoalfioffithefistudy.
C) Selectfiafirandomfisamplefioffistudentsfiandfiteachers.
D) Selectfiafirandomfisamplefioffiteachers.
1
.
,For problems 9 and 10, determine whether the statement is based on census data or sample
data.
9) Thefiaveragefi(mean)fiagefioffiallfi63fiAssociatefiProfessorsfiatfiClifftonfiUniversityfiisfi47fiyears.
A) Censusfidata B)fiSamplefidata
10) Afiresearcherfideterminesfithatfi17%fioffi84fipropertyfiownersfiinfiafilargeficityfiarefibehindfiinfitheirfita
xfipayments.
A) Censusfidata B)fiSamplefidata
For problems 11 and 12, select the most representative sample of the population of interest.
11) Aficollegefistudentfiwhofidoesfilaundryfiinfrequentlyfiwantsfitofideterminefithefieffectfioffistainfiremoverfio
nfiwhatfishouldfibefiwhiteficlothes.
A) Reportsfioffitwofifriends,fionefioffiwhomfiwasfigivenfistainfiremover.
B) Thefireportsfioffianfiinternetfichatroomfionfilaundryfitechniques.
C) Twofiloadsfioffipersonalfiwash,fionefiwith,fionefiwithoutfistainfiremover.
D) Twofiloadsfioffiwash,fionefipersonal,fionefioffiafifriend,fithefistainfiremoverfiassignedfibyfiaficoinfiflip.
12) Thefifatherfioffiafijuniorfihighfischoolfistudentfiwantsfitofideterminefithefimostfipopularfibookfiamongfijuniorfihig
hfistudents.fiSelectfithefisamplefiwithfithefileastfipotentialfibias.
A) Afirandomlyfiselectedfigroupfioffi10fibookfisellers
B) Afirandomlyfiselectedfigroupfioffi30fijuniorfihighfistudents
C) Afirandomlyfiselectedfigroupfioffi30fijuniorfihighfistudentsfileavingfithefipublicfilibrary
D) Thefigroupfioffi30fijuniorfihighfistudentsfiattendingfithefibirthdayfipartyfioffithefiresearcher’sfichild
For problems 13 and 14, identify the sampling technique that was used.
13) Afisampleficonsistsfioffieveryfi49thfistudentfifromfiafigroupfioffi496fistudents.
A) Systematic
B) Cluster
C) Convenience
D) Random
E) Stratified
14) Tofiavoidfiworkingfilate,fiafiquality-controlfianalystfisimplyfiinspectsfithefifirstfi100fiitemsfiproducedfiinfiafiday.
A) Systematic
B) Cluster
C) Convenience
D) Random
E) Stratified
For problems 15 and 16, determine whether the study is experimental or observational?
15) Afimarketingfifirmfidoesfiafisurveyfitofifindfioutfihowfimanyfipeoplefiusefiafiproduct.fiOffithefi100fipeop
leficontacted,fi15fisaidfitheyfiusefithefiproduct.
A) Observational B)fiExperimental
16) Twofisamplesfioffifishfiarefitakenfifromfiafiriverfiupstreamfiandfidownstreamfioffiafifactoryfitofimeasurefithefieffe
ctfioffipollutionfifromfithefifactoryfionfithefifish.
A) Observational B)fiExperimental
2
.
, 17) Afinutritionistfiwantsfitoficonductfiafistudyfitofivalidatefithefiefficacyfioffianfiherbfiasfianfiaidfiinfiweightfiloss.fiS
hefirandomlyfiassignsfihalffioffiafigroupfioffioverweightfipeoplefitofiafitreatmentfigroupfiwhofiarefigivenfithefiher
bfiwithfiinstructionsfiforfiitsfiusefiandfiafiplannedfidietfiforfisixfiweeks.fiThefiotherfihalffioffithefigroupfiisfigivenfi
parsleyfiwithfithefisamefiinstructionsfiandfisamefidiet.fiAfinursefiatfithefinutritionficenterfiweighsfieachfisubjectfio
nfiFridayfioffieachfiweek.fiSelectfithefipotentialfisourcefiofficonfounding.
A) Thefiplacebofieffect
B) Experimenterfieffect
C) Methodfioffiassignmentfitofitreatmentfiandficontrolfigroups
D) Thefistudyfiisfiessentiallyfifreefioffipotentialficonfounding.
18) Selectfithefimostfiappropriatefitypefioffistudyfiforfithefiquestion:fiWhichfiisfithefibestfifertilizerfiforfiMr.fiJimenez
’sfibackyardfigrass?
A) Experimental B)fiExperimentalfiblinded
C)fiDouble-blind D)fiObservational
19) Whichfidatafiprovidefithefianswerfitofithefiquestion:fi“HowfimanyfitimesfiafiweekfidofistudentsfiatfiEurek
afiCollegefistudyfimorefithanfithreefihoursfiafiday?”
A) Offi100fistudentsfisurveyed,fi43fireportedfithatfitheyfistudyfiatfileastfithreefihoursfiafidayfionfiSaturdaysfian
dfiSundays.
B) Offi100fistudentsfisurveyed,fi43fireportedfithatfitheyfihavefistudiedfiatfileastfithreefihoursfiafiday.
C) Offi100fistudentsfisurveyed,fi43fireportedfithatfitheyfistudiedfiatfileastfithreefihoursfiafidayfitwicefilastfiweek.
D) Offi100fistudentsfisurveyed,fi43fireportedfithatfitheyfiintendfitofistudyfiatfileastfithreefihoursfiafidayfine
xtfiweek.
20) Determinefiwhichfievaluationfiguidelinefiappliesfibestfiinfiquestioningfithefiresultsfioffithefidescribedfistudy:
Afihomeownerfiputfiafibrand-
namefifertilizer/weedfikillerfionfihalffioffihisfilawnfiandfiafigenericfifertilizer/weedfikillerfionfithefiotherfihalf.fiA
fterfithreefiweeks,fithefigenericfisidefihadfi1fiweedfiperfisquarefimeter,fithefiotherfisidefihadfi1.7fiweedsfiperfisquar
efimeter.fiThefigenericfisidefirequiredfitwofimowingsfiinfithefi3fiweeks,fithefibrand-
finamefisidefione.fiThefihomeownerficoncludedfithat fithefigenericfi wasfisuperiorfitofithefibrandfiname.
A) Considerfipossibleficonfoundingfivariables.
B) Considerfithefisample.
C) Considerfithefitypefioffistudy.
D) Considerfithefisource.
3
.
