Statistics for Managers Using Microsoft Excel 7E - Levine - SM levine_smume7_ism_10

《Statistics for Managers Using Microsoft Excel 7E - Levine - SM levine_smume7_ism_10》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、SolutionstoEnd-of-SectionandChapterReviewProblems421CHAPTER1010.1df=n1+n2–2=12+15–2=2510.2(a)=22(b)d.f.=(n1–1)+(n2–1)=7+14=21(c)Decisionrule:d.f.=21.IftSTAT>2.5177,rejectH0.(d)Decision:Sincet=3.8959isgreaterthanthecriticalboundof2.5177,rejectH0.Thereisenoughevidencetoconcludethatthefirstpopu

2、lationmeanislargerthanthesecondpopulationmean.10.3Assumethatyouaresamplingfromtwoindependentnormaldistributionshavingequalvariances.10.410.5df==5+4–2=7Copyright©2014PearsonEducation,Inc.SolutionstoEnd-of-SectionandChapterReviewProblems42110.6PHStatoutput:DataHypothesizedDifference0LevelofSig

3、nificance0.01Population1Sample SampleSize5SampleMean42SampleStandardDeviation4Population2Sample SampleSize4SampleMean34SampleStandardDeviation5IntermediateCalculationsPopulation1SampleDegreesofFreedom4Population2SampleDegreesofFreedom3TotalDegreesofFreedom7PooledVariance19.85714DifferenceinS

4、ampleMeans8tTestStatistic2.676242Upper-TailTest UpperCriticalValue2.997949p-Value0.015856Donotrejectthenullhypothesis H0:H1:Teststatistic:=2.6762Decision:SincetSTAT=2.6762issmallerthantheuppercriticalboundsof2.9979,donotrejectH0.Thereisnotenoughevidenceofadifferenceinthemeansofthetwopopulati

5、ons.Copyright©2014PearsonEducation,Inc.SolutionstoEnd-of-SectionandChapterReviewProblems42110.7(a)H0:Themeanestimatedamountofcaloriesinthecheeseburgerisnotlowerforthepeoplewhothoughtaboutthecheesecakefirstthanforthepeoplewhothoughtabouttheorganicfruitsaladfirst.H1:Themeanestimatedamountofcal

6、oriesinthecheeseburgerislowerforthepeoplewhothoughtaboutthecheesecakefirstthanforthepeoplewhothoughtabouttheorganicfruitsaladfirst.(b)TypeIerroristheerrormadeinconcludingthatthemeanestimatedamountofcaloriesinthecheeseburgerislowerforthepeoplewhothoughtaboutthecheesecakefirstthanforthepeoplew

7、hothoughtabouttheorganicfruitsaladfirstwhenthemeanestimatedamountofcaloriesinthecheeseburgerisinfactnotlowerforthepeoplewhothoughtaboutthecheesecakefirstthanforthepeoplewhothoughtabouttheorganicfruitsaladfirst.(c)TypeIIerroristheerrormadeinconcludi