1. Basic Statistics 1 Measurement -- Professor Stipak presents --

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

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

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

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

6. Measurement: Importance Measurement Data Statistics

7. Measurement: Overview Basic Concepts Levels of Measurement Validity/Reliability

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

9. Measurement: Levels Ratio Interval Ordinal Nominal

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

11. Measurement: Quality Reliability of Measurement Validity of Measurement Measurement Error