Problem
1. Describe the interrupted time series and the control series designs. What are the strengths of the control series design as compared with the interrupted time series design?
2. Distinguish between longitudinal, cross-sectional, and sequential methods.
3. What is a cohort effect?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.