If a randomized experiment cannot be done, then four ...

[Ebrown]

If a randomized experiment cannot be done, then four non-statistical considerations must be used (all together) to establish evidence of a possible causal connection between two measurement variables. Name them.

Question 2

Give an example where a randomized experiment cannot be done, even though we know that is the best way to try to establish a causal connection between two measurement variables.

[elizabethrperez]

Answer to Question 1

1) THERE IS A REASONABLE EXPLANATION OF CAUSE AND EFFECT; 2) THE CONNECTION HAPPENS UNDER VARYING CONDITIONS;3) POTENTIAL CONFOUNDING VARIABLES ARE RULED OUT; 4) THERE IS A DOSE-RESPONSE RELATIONSHIP.

Answer to Question 2

ANY REASONABLE ANSWER OK. EXAMPLES: DOES SMOKING CAUSE LUNG CANCER?

[Ebrown]

Thanks

[elizabethrperez]

Welcome