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Published byNeal Gregory Modified over 2 years ago

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Basic Statistics 1 Measurement -- Professor Stipak presents --

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Simple Statistics Example How do we report motor vehicle theft rates?

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Simple Statistics Example How do we report motor vehicle theft rates? Accepted practice: Thefts per 1000 population Alternative: Thefts per 1000 motor vehicles

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Motor Vehicle Theft Rates: Thefts / 1000 Population New York City12 Chicago16 Philadelphia19 Los Angeles20 Detroit22

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Motor Vehicle Theft Rates: Thefts / 1000 Motor Vehicles Los Angeles34 Chicago45 Detroit47 Philadelphia49 New York City53

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Measurement: Importance Measurement Data Statistics

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Measurement: Overview Basic Concepts Levels of Measurement Validity/Reliability

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Measurement: Basic Concepts UOA / Case Variable Value –Record data in a table: rows-cases, cols-variables

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Measurement: Levels Ratio Interval Ordinal Nominal

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Data In Public Agencies Types of data in agencies Sources of data Types of datasets, examples: census data, merged data

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Measurement: Quality Reliability of Measurement Validity of Measurement Measurement Error

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