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1. Explain the steps in research process. 
2. What 3 factors should be met for an exposure to qualify as a risk factor? 
3. What are some of the techniques that can be used to control or prevent confounding? 
4. As are researcher, if you plan to use secondary databases for your project, what are the suggested ways of developing research questions for secondary data analysis? 
5. One of the major problems our nation currently is faced with is increasing rates of sleep apnea in children. Below is a very generic scenario of this problem. 
Scenario: Childhood sleep apnea rates are increasing in U.S. and around the world. Lifestyle behaviors (diet, exercise, sedentary behavior) are considered to be significant contributors to this problem. Based on this problem statement, address the following: 
a. Design a “descriptive” research question and describe the appropriate study design to answer this question.
 b. Design an “association” research question and describe the appropriate study design.
 c. Design a “causal” research question and describe the appropriate study design. 
6. Please state and briefly explain the direct threats to internal validity. 
7. What is the difference between probability and non-probability sampling?
 8. Describe some of the strategies that can be used to maximize subject retention? 
9. Define skewness. And what does positive skewness indicate. 
10. Discuss the three levels on which prevention and control of bias are accomplished.

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