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1、THEUNIVERSITYOFLETHBRIDGEDEPARTMENTOFGEOGRAPHYGEOGRAPHY3235:QuantitativeModelsforGeographicAnalysisFall2007Assignment2–InputEvaluationandTrendProjection(Part1)IntroductionCurve-fittingandextrapolationtechniquesprovidewell-definedscientificmethodsforquantita
2、tivemodellerstounderstandpasttrendsandmakeeducatedpredictionsaboutfuturetrends.Initially,onemustperforminputevaluation–thatis,thecurve‘fitting’procedure–toselectanappropriatemathematicalmodelthatencompassesthepastdata.GoalTobecomefamiliarwiththeinputevaluat
3、ionphaseofthetrendprojectionproceduresandtoapplyinputevaluationtohistoricaltimeseriestoevaluatewhichseriesbestrepresentsthedata.Nextweek,Assignment2(Part2)willexplorefittingcurvestotheseriesandassessgoodnessoffit.DataThedataforthisexerciseareprovidedtoyouin
4、anExcelspreadsheetanddescribe:MaunaLoa,Hawaii,USAYearlyAverageCarbonDioxideEmissions–Source:C.D.Keeling,T.P.Whorf,andtheCarbonDioxideResearchGroup,ScrippsInstitutionofOceanography(SIO),UniversityofCalifornia.Taber,AlbertaOfficialPopulation–Source:AlbertaMun
5、icipalAffairs,OfficialPopulations,1901-2001.Availableonlineathttp://www.municipalaffairs.gov.ab.ca/ms_official_pop_lists.htmCalgary,AlbertaOfficialPopulation–Source:StatisticsCanada,CensusofPopulation.Page6of6THEUNIVERSITYOFLETHBRIDGEDEPARTMENTOFGEOGRAPHYGE
6、OGRAPHY3235:QuantitativeModelsforGeographicAnalysisFall2007GeneralInstructionsforPerfomingInputEvaluationAnalysisusingSPSSPartA:Createthe7RequiredVariablesforInputAnalysis·Createtwovariables—“year”and“pop”.Entertheappropriatedataforyourproblemintothesetwoco
7、lumns.IntheVariableView,makesuretosettheappropriatedatatype,columnwidthandnumberofdecimals,andvariablelabel.·UsingTransform>Compute,createanewvariablecalled“logpop”.UsethearithmeticfunctionLG10asshownbelow:··UsingTransform>Compute,createanewvariablecalled“r
8、ecippop”.Tocalculatethisvariable,usetheinverseofthepopulationasshownbelow,andformatthisnewvariabletoshow6decimalplaces.··UsingTransform>CreateTimeSeries,createanewvariablecalled“diff_recippop”thatcalcu
