Problem
Explain the kinds of conclusions that can be drawn from each research design as well as the specific kinds of conclusions that can't be drawn from the designs. For example, you've likely heard that "correlation does not equal causation," which tells us a specific limit on the conclusions of such a design.
List of research designs
i. Animal Study
ii. Case Report
iii. Meta-Analysis
iv. Observational Study
v. Randomized Controlled Trial.