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1、Chapter11ChapterOneWhatisStatistics?ONEUnderstandwhywestudystatistics.TWOExplainwhatismeantbydescriptivestatisticsandinferentialstatistics.THREEDistinguishbetweenaqualitativevariableandaquantitativevariable.FOURDistinguishbetweenadiscretevariableandacontinuousvariable.FIVEDis
2、tinguishamongthenominal,ordinal,interval,andratiolevels ofmeasurement.SIXDefinethetermsmutuallyexclusiveandexhaustive.GOALSWhenyouhavecompletedthischapter,youwillbeableto:2Whystudystatistics?NumericalinfoiseverywhereButhowdoweknowifconclusionsreportedareaccurate?Statisticalte
3、chniquesareusedtomakedecisionsthataffectourlivesThisiswhyyoungerpeoplepaymoreforinsurance…KnowledgeofstatisticalmethodsatleasthelpsyouunderstandwhydecisionsaremadeInfutureyouwillmakedecisionsthatinvolvedata3WhatisMeantbyStatistics?Statisticsisthescienceofcollecting,organizing
4、,presenting,analyzing,andinterpretingnumericaldatatoassistinmakingmoreeffectivedecisions.Incommonusagestatisticsreferstonumericalinformation…..Butinthiscoursethetermhasawidermeaning….4WhoUsesStatistics?Statisticaltechniquesareusedextensivelybymanagersinmarketing,accounting,qu
5、alitycontrol,consumers,professionalsportspeople,hospitaladministrators,educators,politicians,physicians,gamblers,etc...5TypesofStatisticsDescriptiveStatistics:Methodsoforganizing,summarizing,andpresentingdatainaninformativeway.EXAMPLE1:AGalluppollfoundthat49%ofthepeopleinasur
6、veyknewthenameofthefirstbookoftheBible.Thestatistic49describesthenumberoutofevery100personswhoknewtheanswer.6TypesofStatisticsDescriptiveStatistics:Methodsoforganizing,summarizing,andpresentingdatainaninformativeway.EXAMPLE2:AccordingtoConsumerReports,GeneralElectricwashingma
7、chineownersreported9problemsper100machinesduring2002.Thestatistic9describesthenumberofproblemsoutofevery100machines.7TypesofStatisticsDescriptiveStatistics:Methodsoforganizing,summarizing,andpresentingdatainaninformativeway.EXAMPLE3:TheCanadiangovernmentreportsthatthepopulati
8、onofCanadawas18,238,000in1961,21,568,000in1971,24,820,000in1981,28,0
