统计学课件.pdfVIP

Stat 13, Tue 5/1/12. 1. Midterm 1. 2. Expected value, lotto and roulette. 3. Normal calculations. Read ch4. Hw4 is due Tue, 5/8, and Midterm 2 is Thur, 5/17. When submitting hw in the future, please make 4 stacks: section 1a, 1b, 1c, 1d. Gradegrubbingprocedure:ifyouwouldlikeaqueson(ormorethanonequeson) reevaluated,submityourexamorhomeworkandaWRITTENexplanaonofwhyyou thinkyoudeservemorepointsandhowmanymorepointsyouthinkyoudeservetoyour TA.TheTAwillthengiveittome,andIwillconsiderit,andthengiveitbacktotheTAto givebacktoyou. Midterms:90100=Arange,8090=Brange,7080=Crange,6070=Drange,60=F. Irecordyournumber,nottheleergrade.Yourgradeisonthelastpage. Commonmistakes:bias≠lying.showeringdecreaseingermsbeerhealth. brushingrounebeerhealth.Memorylosscausesyounottobrush? Goodconfoundingfactors:conscienousness,age,reading,wealth,sugar,social interacons,smoking,medicaons. 1 Be SILENT while I am passing out the exams or I will ask you to leave. Gradegrubbingprocedure:ifyouwouldlikeaqueson(ormorethanonequeson) reevaluated,submityourexamorhomeworkandaWRITTENexplanaonofwhyyou thinkyoudeservemorepointsandhowmanymorepointsyouthinkyoudeservetoyour TA.TheTAwillthengiveittome,andIwillconsiderit,andthengiveitbacktotheTAto givebacktoyou. Midterms:90100=Arange,8090=Brange,7080=Crange,6070=Drange,60=F. Irecordyournumber,nottheleergrade.Yourgradeisonthelastpage. Commonmistakes:bias≠lying.showeringdecreaseingermsbeerhealth. brushingrounebeerhealth.Memorylosscausesyounottobrush? Goodconfoundingfactors:conscienousness,age,reading,wealth,sugar,social interacons,smoking,medicaons. 2 2)Expectedvalue,looandroulee. IfarandomvariableXhascertainvaluesyitcantakewithcertainknownprobabiliesp , i i thenitsExpectedvalue,E(X)=∑ y p .