Complete the Quantitative Research Methods Matrix according to the following guidelines:
List the primary characteristics of each design
Locate a current peer-reviewed article (within the past 5 years) in your field that demonstrates each quantitative research method
Explain the following for each article:
The problem investigated
How the sample was selected
How variables were defined and measured
How data were collected and analyzed
The key findings:
The generalizability of the findings
Format your matrix consistent with APA guidelines.