商务统计学 第九章习题chap09-TIF-BSAFC5.doc

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1、CHAPTER9:FUNDAMENTALSOFHYPOTHESISTESTING:ONE-SAMPLETESTS1.Whichofthefollowingwouldbeanappropriatenullhypothesis?a)Themeanofapopulationisequalto55.b)Themeanofasampleisequalto55.c)Themeanofapopulationisgreaterthan55.d)Only(a)and(c)aretrue.ANSWER:aTYPE:MCDIFFICULTY:EasyKEYWORDS:formofhypo

2、thesis2.Whichofthefollowingwouldbeanappropriatenullhypothesis?a)Thepopulationproportionislessthan0.65.b)Thesampleproportionislessthan0.65.c)Thepopulationproportionisnolessthan0.65.d)Thesampleproportionisnolessthan0.65.ANSWER:cTYPE:MCDIFFICULTY:EasyKEYWORDS:formofhypothesis3.Whichofthef

3、ollowingwouldbeanappropriatealternativehypothesis?a)Themeanofapopulationisequalto55.b)Themeanofasampleisequalto55.c)Themeanofapopulationisgreaterthan55.d)Themeanofasampleisgreaterthan55.ANSWER:cTYPE:MCDIFFICULTY:EasyKEYWORDS:formofhypothesis4.Whichofthefollowingwouldbeanappropriatealte

4、rnativehypothesis?a)Thepopulationproportionislessthan0.65.b)Thesampleproportionislessthan0.65.c)Thepopulationproportionisnolessthan0.65.d)Thesampleproportionisnolessthan0.65.ANSWER:aTYPE:MCDIFFICULTY:EasyKEYWORDS:formofhypothesis5.ATypeIIerroriscommittedwhena)werejectanullhypothesistha

5、tistrue.a)wedon'trejectanullhypothesisthatistrue.b)werejectanullhypothesisthatisfalse.c)wedon'trejectanullhypothesisthatisfalse.ANSWER:dTYPE:MCDIFFICULTY:EasyKEYWORDS:typeIIerror2.ATypeIerroriscommittedwhena)werejectanullhypothesisthatistrue.b)wedon'trejectanullhypothesisthatistrue.c)w

6、erejectanullhypothesisthatisfalse.d)wedon'trejectanullhypothesisthatisfalse.ANSWER:aTYPE:MCDIFFICULTY:EasyKEYWORDS:typeIerror3.Thepowerofatestismeasuredbyitscapabilityofa)rejectinganullhypothesisthatistrue.b)notrejectinganullhypothesisthatistrue.c)rejectinganullhypothesisthatisfalse.d)

7、notrejectinganullhypothesisthatisfalse.ANSWER:cTYPE:MCDIFFICULTY:EasyKEYWORDS:power4.TrueorFalse:Foragivenlevelofsignificance,ifthesamplesizeisincreased,thepowerofthetestwillincrease.ANSWER:TrueTYPE:TFDIFFICULTY:ModerateKEYWORDS:power,levelofsignificance,samplesize5.TrueorFalse:Forag