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1、Chapter11ChapterOneWhatisStatistics?ONEUnderstandwhywestudystatistics.TWOExplainwhatismeantbydescriptivestatisticsandinferentialstatistics.THREEDistinguishbetweenaqualitativevariableandaquantitativevariable.FOURDistinguishbetweenadiscretevariableandacontinuo
2、usvariable.FIVEDistinguishamongthenominal,ordinal,interval,andratiolevels ofmeasurement.SIXDefinethetermsmutuallyexclusiveandexhaustive.GOALSWhenyouhavecompletedthischapter,youwillbeableto:2Whystudystatistics?NumericalinfoiseverywhereButhowdoweknowifconclusi
3、onsreportedareaccurate?StatisticaltechniquesareusedtomakedecisionsthataffectourlivesThisiswhyyoungerpeoplepaymoreforinsurance…KnowledgeofstatisticalmethodsatleasthelpsyouunderstandwhydecisionsaremadeInfutureyouwillmakedecisionsthatinvolvedata3WhatisMeantbySt
4、atistics?Statisticsisthescienceofcollecting,organizing,presenting,analyzing,andinterpretingnumericaldatatoassistinmakingmoreeffectivedecisions.Incommonusagestatisticsreferstonumericalinformation…..Butinthiscoursethetermhasawidermeaning….4WhoUsesStatistics?St
5、atisticaltechniquesareusedextensivelybymanagersinmarketing,accounting,qualitycontrol,consumers,professionalsportspeople,hospitaladministrators,educators,politicians,physicians,gamblers,etc...5TypesofStatisticsDescriptiveStatistics:Methodsoforganizing,summari
6、zing,andpresentingdatainaninformativeway.EXAMPLE1:AGalluppollfoundthat49%ofthepeopleinasurveyknewthenameofthefirstbookoftheBible.Thestatistic49describesthenumberoutofevery100personswhoknewtheanswer.6TypesofStatisticsDescriptiveStatistics:Methodsoforganizing,
7、summarizing,andpresentingdatainaninformativeway.EXAMPLE2:AccordingtoConsumerReports,GeneralElectricwashingmachineownersreported9problemsper100machinesduring2002.Thestatistic9describesthenumberofproblemsoutofevery100machines.7TypesofStatisticsDescriptiveStati
8、stics:Methodsoforganizing,summarizing,andpresentingdatainaninformativeway.EXAMPLE3:TheCanadiangovernmentreportsthatthepopulationofCanadawas18,238,000in1961,21,568,000in1971,24,820,000in1981,28,0
