Explain the differences between Research Methods and Research Design.

Explain the differences between Research Methods and Research Design. Provide a description of two method examples and two examples of design types. When each is used? What is the process of choosing a correct research method and a correct research design? 
READINGS
Descriptive Statisticsssentials of Applied Quantitative Methods for Health Services, Chapter 1: The Role and Function of Quantitative Methods in Health Services Management 
Doing Quantitative Research in Education, Chapter 1(consider how the methods are applicable to healthcare service research): Introduction to Quantitative Research
Why we need observational studies to evaluate the effectiveness of healthcare 
“Utilization of maternal health-care services by tribal women in Kerala” (in eReserves)
Descriptive Statistics