商务统计学第九章习题chap09TIFBSAFC5.docx
- 文档编号:4080674
- 上传时间:2022-11-27
- 格式:DOCX
- 页数:44
- 大小:26.70KB
商务统计学第九章习题chap09TIFBSAFC5.docx
《商务统计学第九章习题chap09TIFBSAFC5.docx》由会员分享,可在线阅读,更多相关《商务统计学第九章习题chap09TIFBSAFC5.docx(44页珍藏版)》请在冰豆网上搜索。
商务统计学第九章习题chap09TIFBSAFC5
CHAPTER9:
FUNDAMENTALSOFHYPOTHESISTESTING:
ONE-SAMPLETESTS
1.Whichofthefollowingwouldbeanappropriatenullhypothesis?
a)Themeanofapopulationisequalto55.
b)Themeanofasampleisequalto55.
c)Themeanofapopulationisgreaterthan55.
d)Only(a)and(c)aretrue.
ANSWER:
a
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
formofhypothesis
2.Whichofthefollowingwouldbeanappropriatenullhypothesis?
a)Thepopulationproportionislessthan0.65.
b)Thesampleproportionislessthan0.65.
c)Thepopulationproportionisnolessthan0.65.
d)Thesampleproportionisnolessthan0.65.
ANSWER:
c
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
formofhypothesis
3.Whichofthefollowingwouldbeanappropriatealternativehypothesis?
a)Themeanofapopulationisequalto55.
b)Themeanofasampleisequalto55.
c)Themeanofapopulationisgreaterthan55.
d)Themeanofasampleisgreaterthan55.
ANSWER:
c
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
formofhypothesis
4.Whichofthefollowingwouldbeanappropriatealternativehypothesis?
a)Thepopulationproportionislessthan0.65.
b)Thesampleproportionislessthan0.65.
c)Thepopulationproportionisnolessthan0.65.
d)Thesampleproportionisnolessthan0.65.
ANSWER:
a
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
formofhypothesis
5.ATypeIIerroriscommittedwhen
266FundamentalsofHypothesisTesting:
One-SampleTests
a)werejectanullhypothesisthatistrue.
b)wedon'trejectanullhypothesisthatistrue.
c)werejectanullhypothesisthatisfalse.
d)wedon'trejectanullhypothesisthatisfalse.
ANSWER:
d
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
typeIIerror
6.ATypeIerroriscommittedwhen
a)werejectanullhypothesisthatistrue.
b)wedon'trejectanullhypothesisthatistrue.
c)werejectanullhypothesisthatisfalse.
d)wedon'trejectanullhypothesisthatisfalse.
ANSWER:
a
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
typeIerror
7.Thepowerofatestismeasuredbyitscapabilityof
a)rejectinganullhypothesisthatistrue.
b)notrejectinganullhypothesisthatistrue.
c)rejectinganullhypothesisthatisfalse.
d)notrejectinganullhypothesisthatisfalse.
ANSWER:
c
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
power
8.TrueorFalse:
Foragivenlevelofsignificance,ifthesamplesizeisincreased,thepowerofthetestwillincrease.
ANSWER:
True
TYPE:
TFDIFFICULTY:
Moderate
KEYWORDS:
power,levelofsignificance,samplesize
9.TrueorFalse:
Foragivenlevelofsignificance,ifthesamplesizeisincreased,theprobabilityofcommittingaTypeIerrorwillincrease.
ANSWER:
False
TYPE:
TFDIFFICULTY:
Moderate
KEYWORDS:
levelofsignificance,samplesize,typeIerror
10.TrueorFalse:
Foragivenlevelofsignificance,ifthesamplesizeisincreased,theprobabilityofcommittingaTypeIIerrorwillincrease.
Copyright©2010PearsonEducation,Inc.PublishingasPrenticeHall
ANSWER:
False
TYPE:
TFDIFFICULTY:
Moderate
KEYWORDS:
levelofsignificance,samplesize,typeIIerror
11.TrueorFalse:
Foragivensamplesize,theprobabilityofcommittingaTypeIIerrorwillincreasewhentheprobabilityofcommittingaTypeIerrorisreduced.
ANSWER:
True
TYPE:
TFDIFFICULTY:
Moderate
KEYWORDS:
samplesize,typeIerror,typeIIerror
12.Ifaneconomistwishestodeterminewhetherthereisevidencethataveragefamilyincomeinacommunityexceeds$25,000
a)eitheraone-tailedortwo-tailedtestcouldbeusedwithequivalentresults.
b)aone-tailedtestshouldbeutilized.
c)atwo-tailedtestshouldbeutilized.
d)Noneoftheabove.
ANSWER:
b
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
one-tailedtest
13.Ifaneconomistwishestodeterminewhetherthereisevidencethataveragefamilyincomeinacommunityequals$25,000
a)eitheraone-tailedortwo-tailedtestcouldbeusedwithequivalentresults.
b)aone-tailedtestshouldbeutilized.
c)atwo-tailedtestshouldbeutilized.
d)Noneoftheabove.
ANSWER:
c
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
two-tailedtest
14.Ifthep-valueislessthaninatwo-tailedtest,
a)thenullhypothesisshouldnotberejected.
b)thenullhypothesisshouldberejected.
c)aone-tailedtestshouldbeused.
d)noconclusionshouldbereached.
ANSWER:
b
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
p-value,levelofsignificance
15.IfatestofhypothesishasaTypeIerrorprobability()of0.01,wemean
a)ifthenullhypothesisistrue,wedon'trejectit1%ofthetime.
b)ifthenullhypothesisistrue,werejectit1%ofthetime.
268FundamentalsofHypothesisTesting:
One-SampleTests
c)ifthenullhypothesisisfalse,wedon'trejectit1%ofthetime.
d)ifthenullhypothesisisfalse,werejectit1%ofthetime.
ANSWER:
b
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
typeIerror,levelofsignificance
16.IftheTypeIerror()foragiventestistobedecreased,thenforafixedsamplesizen
a)theTypeIIerror()willalsodecrease.
b)theTypeIIerror()willincrease.
c)thepowerofthetestwillincrease.
d)aone-tailedtestmustbeutilized.
ANSWER:
b
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
typeIerror,typeIIerror,samplesize
17.Foragivensamplesizen,ifthelevelofsignificance()isdecreased,thepowerofthetest
a)willincrease.
b)willdecrease.
c)willremainthesame.
d)cannotbedetermined.
ANSWER:
b
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
levelofsignificance,power,samplesize
18.Foragivenlevelofsignificance(),ifthesamplesizenisincreased,theprobabilityofaTypeIIerror()
a)willdecrease.
b)willincrease.
c)willremainthesame.
d)cannotbedetermined.
ANSWER:
a
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
levelofsignificance,beta-risk,samplesize
19.Youknowthatthelevelofsignificance()ofatestis5%,youcantellthattheprobabilityofcommittingaTypeIIerror()is
a)2.5%
b)95%.
Copyright©2010PearsonEducation,Inc.PublishingasPrenticeHall
c)97.5%
d)unknown
ANSWER:
d
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
levelofsignificance,beta-risk
20.YouknowthattheprobabilityofcommittingaTypeIIerror()is5%,youcantellthatthepowerofthetestis
a)2.5%
b)95%.
c)97.5%
d)unknown
ANSWER:
b
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
levelofsignificance,beta-risk,power
21.Ifaresearcherrejectsatruenullhypothesis,shehasmadeaerror.
ANSWER:
TypeI
TYPE:
FIDIFFICULTY:
Easy
KEYWORDS:
typeIerror
22.Ifaresearcheracceptsatruenullhypothesis,shehasmadeadecision.
ANSWER:
correct
TYPE:
FIDIFFICULTY:
Easy
KEYWORDS:
decision
23.Ifaresearcherrejectsafalsenullhypothesis,shehasmadeadecision.
ANSWER:
correct
TYPE:
FIDIFFICULTY:
Easy
KEYWORDS:
decision
24.Ifaresearcheracceptsafalsenullhypothesis,shehasmadeaerror.
ANSWER:
TypeII
TYPE:
FIDIFFICULTY:
Easy
KEYWORDS:
typeIIerror
25.Itispossibletodirectlycomparetheresultsofaconfidenceintervalestimatetotheresultsobtainedbytestinganullhypothesisif
a)atwo-tailedtestforisused.
b)aone-tailedtestforisused.
c)Bothofthepreviousstatementsaretrue.
270FundamentalsofHypothesisTesting:
One-SampleTests
d)Noneofthepreviousstatementsistrue.
ANSWER:
a
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
confidenceinterval,two-tailedtest
26.Thepowerofastatisticaltestis
a)theprobabilityofnotrejectingH0whenitisfalse.
b)theprobabilityofrejectingH0whenitistrue.
c)theprobabilityofnotrejectingH0whenitistrue.
d)theprobabilityofrejectingH0whenitisfalse.
ANSWER:
d
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
power
27.Thesymbolforthepowerofastatisticaltestis
a).
b)1–.
c).
d)1–.
ANSWER:
d
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
power
28.SupposewewishtotestH0:
47versusH1:
>47.Whatwillresultifweconcludethatthemeanisgreaterthan47whenitstruevalueisreally52?
a)WehavemadeaTypeIerror.
b)WehavemadeaTypeIIerror.
c)Wehavemadeacorrectdecision
d)Noneoftheabovearecorrect.
ANSWER:
c
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
one-tailedtest,conclusion
29.HowmanyKleenexshouldtheKimberlyClarkCorporationpackageoftissuescontain?
Researchersdeterminedthat60tissuesistheaveragenumberoftissuesusedduringacold.Supposearandomsampleof100Kleenexusersyieldedthefollowingdataonthenumberoftissuesusedduringacold:
=52,s=22.Givethenullandalternativehypothesestodetermine
ifthenumberoftissuesusedduringacoldislessthan60.
a)
Copyright©2010PearsonEducation,Inc.PublishingasPrenticeHall
b)
c)
d)
ANSWER:
b
TYPE:
MCDIFFICULTY:
Moderate
KEYWORDS:
one-tailedtest,formofhypothesis,formofhypothesis,mean,ttest
30.HowmanyKleenexshouldtheKimberlyClarkCorporationpackageoftissuescontain?
Researchersdeterminedthat60tissuesistheaveragenumberoftissuesusedduringacold.Supposearandomsampleof100Kleenexusersyieldedthefollowingdataonthenumberoftissuesusedduringacold:
=52,s=22.Usingthesampleinformationprovided,calculatethe
valueoftheteststatistic.
a)t=(52-60)/22
b)t=(52-60)/(22/100)
c)t=(52-60)/(22/1002)
d)t=(52-60)/(22/10)
ANSWER:
d
TYPE:
MCDIFFICULTY:
Easy
KEYWORDS:
one-tailedtest,mean,ttest
31.HowmanyKleenexshouldtheKimberlyClarkCorporationpackageoftissuescontain?
Researchersdeterminedthat60tissuesistheaveragenumberoftissuesusedduringacold.Supposearandomsampleof100Kleenexusersyieldedthefollowingdataonthenumberoftissuesusedduringacold:
=52,s=22.Supposethealternativewewantedtotestwas
.St
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 商务 统计学 第九 习题 chap09TIFBSAFC5