Choose one of the populations below, and design a sampling plan using the instructions provided:

Populations to Choose From:

• Philadelphia police officers
• State licensed drivers in the US
• Persons incarcerated in Ohio county jails
• Victims of property crime in New York City

Instructions:

1. Identify a research question (RQ) for a study. Remember you study must investigate the population you chose above.
2. Develop one hypothesis related to your RQ.
3. Based on your RQ and hypothesis...
   1. identify your target audience
   2. decide whether the best source of data would be asking questions, direct observation, or examining written records.
   3. Identify your unit of analysis
   4. Describe/identify...
      1. your sample elements
      2. a sampling frame
4. Decide if you would use probability or non-probability sampling, and explain why this choice is best for your project
5. Choose a sampling design, and explain why that design would be best for your project (i.e., what are the strengths of the design, and why do those strengths benefit your study?).
6. Choose a sample size and explain your choice
7. Identify and discuss...
   1. any potential threats to external validity/generalizability (i.e., what are the weaknesses of the sampling design you chose?)
   2. how you will, if possible, address those threats - if a threat to external validity cannot be addressed or corrected, explain why.