AICP Exam Review Statistics/Methods Questions and Answers

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AICP Exam Review Statistics/Methods Questions and Answers

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Institution AICP - American Institute Of Certified Planners

Course AICP - American Institute of Certified Planners

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AICP Exam Review Statistics/Methods Questions and Answers

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AICP Exam Review
Statistics/Methods Questions and
Answers
InferentialAStatisticsA-
AAnswerAUsingAinformationAfromAsamplesAtoAmakeAinferencesAaboutApopulatio
ns;APopulation:AtheAtotalAcollectionAofAallAcasesAinAwhichAtheAresearcherAisAin
terestedAandAwishesAtoAunderstand

EqualAProbabilityAofASelectionAMethodA(EPSEM)A-
AAnswerAAKA:ArandomAselection;ATwoAconditions:A1)AeachAcaseAinAaApopulatio
nAhasAaAknownAprobabilityAofAselectionA2)AeachAcaseAinAaApopulationAhasAan
AequalAprobabilityAofAselection;ATheoretical,AinApracticeAthisAisAnotAreallyAposs
ible

ProbabilityASamplingA-
AAnswerAAnyAsamplingAthatAusesAEPSEM/randomAselection;AMainAadvantages:
AavoidsAsystematicAbiasAandAmoreAlikelyAtoAproduceArepresentativeAsamplesAt
hatAhaveAlessAsamplingAerrorAandAwhereAtheAmarginAofAerrorAcanAbeAestimat
ed;ACanAreduceAtheAmarginAofAerrorAwithAbiggerAsampleAsizesAandAbyAstudyin
gAaAmoreAhomogeneousApopulation;ADisadvantages:AmoreAcostly,AtimeAconsumi
ng,AandAcomplex;AExamples:ASimpleArandom,AsystematicArandom,AstratifiedAra
ndom,Acluster

Non-ProbabilityASamplingA-
AAnswerASamplingAthatAdoesAnotAuseAEPSEM/randomAselection;AMainAadvanta
ges:AcheaperAandAquicker;ADisadvantages:AbecauseAelementsAinApopulationAdoA
notAhaveAequalAchancesAofAbeingAselectedAthereAisAlessAgeneralizability;AExam
ples:Aavailability/convenienceAsampling;ApurposiveAsampling,AsnowballAsamplin
g

DescriptiveAStatisticsA-AAnswerADataAreductionA-
AbasedAonAsamples;ADataAreduction:AsummarizingAmanyAincidences/scoresAwith
AaAfewAstatisticsA(e.g.AmeasuresAofAdispersionA&AmeasuresAofAcentralAtendency
)

, StatisticAvs.AParameterA-
AAnswerAStatistic:AInfoAthatAcomesAfromAaAsample,AusedAasAestimatesAforApar
ameters
Parameter:ATrueAvalueAforAaAstatisticAinAtheAentireApopulation
*ThereAwillAbeAveryAlittleAdifferenceAbetweenAtheseAtwoAifAsamplingAisAdoneAr
igorously

EstimateA-
AAnswerAMeasureAofAaApresent/pastAconditionAthatAcannotAbeAmeasuredAdirect
lyAdueAtoAlackAofAtimeAandAotherAresources;AForAexample:AaApopulationAestim
ateAfromAautoAorAvoterAregistration

ThroughputAIndexA-
AAnswerAMeasureAofAgrossAchangeAinApopulationAmembershipAoverAtime;A>10
0AisAhighA"churning"Apopulation;A<100AindicatesAaAmoreAstableApopulation

NormalA(symmetric)AdistributionA-
AAnswerATheAmean,Amedian,AandAmodeAareAallAsimilar;AAKAAstandardABellAC
urve

StandardADeviationA-
AAnswerAHowAmuch,AonAaverage,AeachA"score"/incidenceAdiffersAfromAtheAmea
n;AUsedAforAnormalAdistributionsAonly

ZAScoreA-
AAnswerATheAnumberAofAstandardAdeviationsAaAscore/incidenceAisApositionedAf
romAtheAmeanAofAaAnormalAcurve;A"Standardized"AscoreAforAuseAinAcalculatin
gApercentiles

ProjectionA-
AAnswerAAAconditionalAstatementAaboutAtheAfuture,AdescribingAwhatAtheAfuture
AisAlikelyAtoAbeAifAaAgivenAsetAofAassumptionsAprovesAtoAbeAtrue;AForAexamp
le:AaAtotalAcommunityApopulationAwillAincreaseAbyA30%AinAtheAnextAdecadeAif
AcurrentAcommunityAgroupAtrendsAcontinue;AUncertaintyAinAprojectionsAincrease
sAwithAlongerAprojectedAtimeAframesAandAsmallerAgeographicalAareas

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