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ID:51528987
大小:968.00 KB
页数:47页
时间:2020-03-22
《商务统计全套配套课件[美]AmirD.AczelJayavelSounderpandian著谭英平等译Chap006.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、COMPLETEBUSINESSSTATISTICSbyAMIRD.ACZEL&JAYAVELSOUNDERPANDIAN6thedition.Chapter6ConfidenceIntervalsUsingStatisticsConfidenceIntervalforthePopulationMeanWhenthePopulationStandardDeviationisKnownConfidenceIntervalsforWhenisUnknown-ThetDistributionLarge-Sa
2、mpleConfidenceIntervalsforthePopulationProportionpConfidenceIntervalsforthePopulationVarianceSampleSizeDeterminationTheTemplatesConfidenceIntervals6ExplainconfidenceintervalsComputeconfidenceintervalsforpopulationmeansComputeconfidenceintervalsforpopulation
3、proportionsComputeconfidenceintervalsforpopulationvariancesComputeminimumsamplesizesneededforanestimationComputeconfidenceintervalsforspecialtypesofsamplingmethodsUsetemplatesforallconfidenceintervalandsamplesizecomputationsLEARNINGOBJECTIVES6Afterstudyingt
4、hischapteryoushouldbeableto:Considerthefollowingstatements:x=550Asingle-valuedestimatethatconveyslittleinformationabouttheactualvalueofthepopulationmean.Weare99%confidentthatisintheinterval[449,551]Anintervalestimatewhichlocatesthepopulationmeanwithinanarr
5、owinterval,withahighlevelofconfidence.Weare90%confidentthatisintheinterval[400,700]Anintervalestimatewhichlocatesthepopulationmeanwithinabroaderinterval,withalowerlevelofconfidence.6-1UsingStatisticsPointEstimateAsingle-valuedestimate.Asingleelementchosenf
6、romasamplingdistribution.Conveyslittleinformationabouttheactualvalueofthepopulationparameter,abouttheaccuracyoftheestimate.ConfidenceIntervalorIntervalEstimateAnintervalorrangeofvaluesbelievedtoincludetheunknownpopulationparameter.Associatedwiththeintervali
7、sameasureoftheconfidencewehavethattheintervaldoesindeedcontaintheparameterofinterest.TypesofEstimatorsAconfidenceintervalorintervalestimateisarangeorintervalofnumbersbelievedtoincludeanunknownpopulationparameter.Associatedwiththeintervalisameasureoftheconfi
8、dencewehavethattheintervaldoesindeedcontaintheparameterofinterest.Aconfidenceintervalorintervalestimatehastwocomponents:ArangeorintervalofvaluesAnassociatedlevelofconfidenceConfidenceIntervalorInterval
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