10bSoupAnalysis

# 10bSoupAnalysis - 3treatments...

This preview shows pages 1–2. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: PracticalDataAnalysis Anotuncommonsituation: Aclientbringsyoudatafromafooddevelopmentstudy: 3treatments: Old“onmarket”formulationofsoup newformulation,Samesaltcontentasold newformulation,Reducedsaltcontent Theyrecruited25people.Askedeachtotasteall3soupsand provideanumericalscoredescribing“howwelldidyoulikethis soup”. Rangefrom0(absolutelyhate)to15(absolutelylove) Theyaskyoutoanalyzethedata. Focusontrt.means: μ O , μ S ,and μ R Theytellyoutheyareinterestedin: Whetherthenewformulationisbetterlikedthantheold Whetherreducingthesaltcontenthasanyeffect Copyright c 2011Dept.ofStatistics(IowaStateUniversity) Statistics511 1/11 PracticalDataAnalysis Howwouldyouanalyzethedata? (N.B.allanalysesaccountforblocking/pairingofobs.withinsubject) 1. ANOVAFtestof μ O = μ S = μ R ,reportp-valueandtrt.means 2. 3pairedt-tests: μ O = μ S , μ O = μ R ,and μ S = μ R , reportp-valuesanddifferencesofmeans 3. abovewithmultiplecomparisonsadjustmentforp-values 4. ANOVAFtest,followedbypairwisecomparisonofmeans, nomult.comp.adj. 5. ANOVAFtest,followedbylinearcontraststoestimate μ O − ( μ S + μ R ) / 2 and μ S − μ R . reportANOVAp-valueandestimates 6. linearcontrasts(above)withoutFtestfirst. 7. Somethingelse:describebrieflywhatyouwoulddo Copyright c 2011Dept.ofStatistics(IowaStateUniversity) Statistics511 2/11 PracticalDataAnalysis...
View Full Document

{[ snackBarMessage ]}

### Page1 / 3

10bSoupAnalysis - 3treatments...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online