Discuss below in a 250 words each:
1. Identify the research purpose of study. What is the central research question being addressed?
2. Identify the independent variable(s). Identify the dependent variable(s). Identify any additional control variable(s).
3. Identify the general population of subjects being used. Based on this population, what sampling strategy did DeFronzo employ? Identify the sampling technique and describe the resulting sample of subjects (people, places, or things) analyzed in the study.
4. Identify the research design used. Explain why this particular design was utilized in comparison to other possible designs.
5. Identify the data collection methods used in this study to measure the variables.
6. Assess the validity and reliability of this research study based on the research components.