On watching this video, students should be able to: Distinguish between an observational and experimental study. Explain the main reason why a randomised experiment can if done well, be used as a test ...

The authors discuss how randomized experiments allow us to assess causal effects and then turn to observational studies. They lay out the assumptions needed ... a high new standard for discussions of ...

A Kansas State University engineer recently published results from an observational study in support of a century-old theory ...