商務統(tǒng)計全套配套課件[美]AmirD.AczelJayavelSounderpandian著譚英平等譯Chap006.ppt

《商務統(tǒng)計全套配套課件[美]AmirD.AczelJayavelSounderpandian著譚英平等譯Chap006.ppt》由會員上傳分享，免費在線閱讀，更多相關內(nèi)容在教育資源-天天文庫。

1、COMPLETEBUSINESSSTATISTICSbyAMIRD.ACZEL&JAYAVELSOUNDERPANDIAN6thedition.Chapter6ConfidenceIntervalsUsingStatisticsConfidenceIntervalforthePopulationMeanWhenthePopulationStandardDeviationisKnownConfidenceIntervalsfor?When?isUnknown-ThetDistributionLarge-Sa

2、mpleConfidenceIntervalsforthePopulationProportionpConfidenceIntervalsforthePopulationVarianceSampleSizeDeterminationTheTemplatesConfidenceIntervals6ExplainconfidenceintervalsComputeconfidenceintervalsforpopulationmeansComputeconfidenceintervalsforpopulation

3、proportionsComputeconfidenceintervalsforpopulationvariancesComputeminimumsamplesizesneededforanestimationComputeconfidenceintervalsforspecialtypesofsamplingmethodsUsetemplatesforallconfidenceintervalandsamplesizecomputationsLEARNINGOBJECTIVES6Afterstudyingt

4、hischapteryoushouldbeableto:Considerthefollowingstatements:x=550Asingle-valuedestimatethatconveyslittleinformationabouttheactualvalueofthepopulationmean.Weare99%confidentthat?isintheinterval[449,551]Anintervalestimatewhichlocatesthepopulationmeanwithinanarr

5、owinterval,withahighlevelofconfidence.Weare90%confidentthat?isintheinterval[400,700]Anintervalestimatewhichlocatesthepopulationmeanwithinabroaderinterval,withalowerlevelofconfidence.6-1UsingStatisticsPointEstimateAsingle-valuedestimate.Asingleelementchosenf

6、romasamplingdistribution.Conveyslittleinformationabouttheactualvalueofthepopulationparameter,abouttheaccuracyoftheestimate.ConfidenceIntervalorIntervalEstimateAnintervalorrangeofvaluesbelievedtoincludetheunknownpopulationparameter.Associatedwiththeintervali

7、sameasureoftheconfidencewehavethattheintervaldoesindeedcontaintheparameterofinterest.TypesofEstimatorsAconfidenceintervalorintervalestimateisarangeorintervalofnumbersbelievedtoincludeanunknownpopulationparameter.Associatedwiththeintervalisameasureoftheconfi

8、dencewehavethattheintervaldoesindeedcontaintheparameterofinterest.Aconfidenceintervalorintervalestimatehastwocomponents:ArangeorintervalofvaluesAnassociatedlevelofconfidenceConfidenceIntervalorInterval