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GEOG 2001.docx

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School
Carleton University
Department
Geography
Course
GEOG 2006
Professor
all
Semester
Winter

Description
GEOG 2006Statistics Exam ReviewTypes of Statistics1DescriptiveoDescribes variablesoProvides a summary of a set of measurementsoCentral tendency dispersion distribution shape2Inferentialomake a generalization about a statistical population by using data from a sample in descriptive Example opinion polls experiments3RelationaloIdentify if events coincideoExplore the association between variables and possibly make predictionsData TypesDiscretewhole numbers integerContinuousdrawn from an infinite number ratioLevelScale of MeasurementNominalqualitativeOrdinalRankedordered categoriesIntervalcontinuous intervals are meaningful arbitrary zeroRationas for interval but with meaningful zeroErrorUncertaintyAccuracyhow close is the measurement to the true valueoInaccuracy from a bias or systematic errorcalibration of machinePrecisionagreement of repeated measurements with each otherrepeatablereproducibleoImprecision caused by random erroroNumerical precision is how many significant figures there areoMeasurement resolution is how refined the scale of measurement isMeasurement uncertaintylast significant digit is uncertainThere is always error2 flavoursoSystematic aka a biasoRandom sometimes referred to as noise or random variabilityData displayUse sources for graphsoSource Derek Mueller GEOG 2006
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