1. What is data management?

2. What are the important of data management?

3. What are the four methods of data collection? Explain each.

4. What are the difference between probability andnon-probability sampling?

5. What are the characteristics off well-designed and well-conductedexperiment?

6. What is placebo and blinding?

7. What is the difference between complete randomized design andrandomized block design?

8. What is the use of chi-square test?

9. How do we know if the null hypothesis is accepted? Please elaborate the answer.

10. What is the importance of the degree of freedom and level of significance?