Chapter 4 Random Variables and Probability Distributions_3296：4章随机变量和概率distributions.ppt

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1、Chapter11:SimpleLinearRegressionMcClave/Sincich:AFirstCourseinStatistics,10thed.Chapter9:SimpleLinearRegression2WhereWe’veBeenPresentedmethodsforestimatingandtestingpopulationparametersforasinglesampleExtendedthosemethodstoallowforacomparisonofpopulati

2、onparametersformultiplesamplesWhereWe’reGoingMcClave/Sincich:AFirstCourseinStatistics,10thed.Chapter9:SimpleLinearRegression3Introducethestraight-linelinearregressionmodelasameansofrelatingonequantitativevariabletoanotherquantitativevariableIntroduceth

3、ecorrelationcoefficientasameansofrelatingonequantitativevariabletoanotherquantitativevariableAssesshowwellthesimplelinearregressionmodelfitsthesampledataUsethesimplelinearregressionmodeltopredictthevalueofonevariablegiventhevalueofanothervariableMcClav

4、e/Sincich:AFirstCourseinStatistics,10thed.Chapter9:SimpleLinearRegression49.1:ProbabilisticModelsMcClave/Sincich:AFirstCourseinStatistics,10thed.Chapter9:SimpleLinearRegression59.1:ProbabilisticModelsTherelationshipbetweenhomerunsandrunsinbaseballseems

5、atfirstglancetobedeterministic…McClave/Sincich:AFirstCourseinStatistics,10thed.Chapter9:SimpleLinearRegression69.1:ProbabilisticModelsButifyouconsiderhowmanyrunnersareonbasewhenthehomerunishit,orevenhowoftenthebattermissesabaseandiscalledout,therigidmo

6、delbecomesmorevariable.McClave/Sincich:AFirstCourseinStatistics,10thed.Chapter9:SimpleLinearRegression79.1:ProbabilisticModelsGeneralFormofProbabilisticModelsy=Deterministiccomponent+Randomerrorwhereyisthevariableofinterest,andthemeanvalueoftherandomer

7、rorisassumedtobe0:E(y)=Deterministiccomponent.McClave/Sincich:AFirstCourseinStatistics,10thed.Chapter9:SimpleLinearRegression89.1:ProbabilisticModelsMcClave/Sincich:AFirstCourseinStatistics,10thed.Chapter9:SimpleLinearRegression99.1:ProbabilisticModels

8、Thegoalofregressionanalysisistofindthestraightlinethatcomesclosesttoallofthepointsinthescatterplotsimultaneously.McClave/Sincich:AFirstCourseinStatistics,10thed.Chapter9:SimpleLinearRegression109.1:ProbabilisticModelsAFirst-OrderProbabi