Research Design

Order Description
Answer the following questions with references:

1. What the difference between Random Sampling and Random Assignment and Discuss the pros and cons, which one is more appropriate and why (should be only 150 words maximum)

2. Discuss what is Field Observation and the scientific validity of it, what is the pros and cons of field observation (for example in terms of ethics, implementation, and scientific validity as
appropriate) with a reference (should be no more than 300 words maximum)