ch11 and ch12 -excel two-sample tests of … othes about two independent samples, 02015 rjerz.com...
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TwoSampleTestsofHypothesisand
AnalysisofVarianceinExcel
Dr.RickJerz
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FormatofHypotheses
• Thehypothesesforcomparingtwoindependentpopulationmeansμ1 andμ2 are:
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PossibleScenarios
1. Populationσ2’sareknown2. Populationσ2’sareunknown
1. Areσ2’sequal?2. Areσ2’sunequal?
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ComparingTwoVariances– FStatistic
• Formatofhypotheses• Totestwhethertwopopulationmeansareequal,wemayalsoneedtotestwhethertwopopulationvariancesareequal.
• Thehypothesesmaybestatedas
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“Special”TestStatistics10-5
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AlternativeExcelMethod–DataAnalysisAdd-in
• Excel:Data|DataAnalysis
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ExcelModelOverview
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TextbookProblem,Ch11
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TextbookProblem Answer
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TextbookProblem,Ch11
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TextbookProblem,Answer(a)
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TextbookProblem,Answer(b)
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TextbookProblem,Ch11
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TextbookProblem,Answer
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TextbookProblem,Ch12
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TextbookProblem,Answer
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