# CJ 526 Statistical Analysis

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```					CJ 526 Statistical Analysis

Research methods and
statistics
Assumptions
1. there is order in nature
2. every event has an explanation
3. we will never know everything
Terminology

Variable: any trait or characteristic
which can take on a range of values
Hypothesis: Question or statement
about the relationship between two or
more variables i.e., is there a
relationship between number of
police on the streets and the crime
rate?
Terms

Independent variable (IV): a variable
thought to have an effect
Dependent variable (DV): affected
variable
Terms
Units of analysis: units observed and
described to create summary
descriptions of all units and to explain
differences among them
Individuals
Groups (i.e., families, gangs)
Organizations (police departments)
Social artifacts (traffic accidents, court
cases, prison riots)
Terms
Theory: an explanation that systematically
organizes observations and hypotheses
Basic vs. Applied Research
Basic--why questions; Applied--solve
problems
Cross-sectional vs. Longitudinal Research
Experimental vs. Ex Post Facto Research
Types of research methods

Experiments (manipulation and
control)
Surveys (written and interviews)
Field or observational research
Record or archival research (content
analysis, secondary analysis)
Case study
Evaluation research
Choosing a research problem
Reviewing the literature: abstracts
and journals, books, collected
(NCJRS), CD ROMS, and the internet
Conceptualization of variables,
hypotheses, questions
Steps in research

Selecting how to measure variables
(operationalization)
Selecting subjects for the study:
population and sample
Method: making observations and
measurements
Data processing and analysis
Steps in research (continued)

Interpreting the results and their
applications

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 views: 0 posted: 10/1/2012 language: English pages: 10