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1、CO5124 DataAnalysisandDecisionModellingLecture1Friday23November2012DisplayingandSummarizingDataHowToDealWithLecturesAskquestions!Ifthere’sanythingyoucan’tseeorhear,thensayso.Donotfeelshy.You’repayingtolearn.Contactthelecturer,Dr.PaulDarwenpaul.darwen@jcu.e
2、du.auPhone(07)3001-7827Orjustcomeuptolevel9,noappointmentneeded.3Thesemesterwillbe5+1+5+1weeks.5weeksof4hoursessions.Mid-semesterbreak:NolecturesfromSaturday22DecembertoSunday6January.5moreweeksof4-hoursessions.Nolecturesintheweekbeforeexams.4Hoursfor10Wee
3、ksTextbookJamesR.Evans“Statistics,DataAnalysis,andDecisionModeling”4thedition,2010.OverviewofthissessionSessionlearninggoalsAbletodisplaydatawithchartsandgraphsusingExcelAbletouseExceltodisplaydescriptivestatisticsforcategoricaldataAbletouseExceltodisplayd
4、escriptivestatisticsfornumericaldata.Categorical/NominalDataAcategoricalvariableplacesanindividualintooneofseveralgroupsorcategories.Howdoyougethereeachday?Walk,driveacar,catchabus,catchatrain,rideabike?Didthesmokerdieofcancer,orlive?Eachcategoryisdifferen
5、t,buthasnonumber.Justdifferentgroups/bins/piles.Alsocallednominaldata.DifferentRubbishBinsYouknowthoserecyclingbins?Onebinforglassbottles.Onebinforpaper.Onebinformetal.Acategoryiswhichbin.Thebinsdon’thavenumbers……they’rejustdifferent.OrdinalVariablesHascat
6、egories,buttheycanberankedorsorted.Howmucheducation?Pickone:PrimaryschoolHighschoolUndergraduateMastersPh.D.LessMoreQuantitativeVariablesAquantitativevariabletakesnumericalvalues.Candoarithmeticonthem(e.g.,add).Heightincentimetres.Weightinkilograms.Salaryi
7、ndollars.Temperatureindegreescelsius.Somethingreal,aphysicalmeasure.Continouous/discreteorratio/intervalDiscreteandContinuousNumericaldatacanbedividedintotwotypes:Discrete–wholenumbers,countsNumberofdefectsperunitofproductionNumberoflateflightsNumberofdeat
8、hsduetoaparticulardiseaseContinuous–basedonacontinuousscaleDeliverytime.Howmuchwaterinabottle.Timespentonhomework.DataCategoricalNumericalDiscreteContinuousExamples:MaritalstatusPoliticalpartyEyecolour(Define
