In order to establish a connection between an explanatory and response variable in an observational study, what is needed?
A)Statistical methods that examine the connection.
B)A comparison to determine if changes in the explanatory variable are related to changes in the response variable.
C)Either a or b
D)You can never establish a connection between an explanatory and a response variable without doing a randomized experiment.

Question

Quizplus · Accepted Answer

Both statistical methods and a comparison between changes in the explanatory and response variables are necessary to establish a connection between them in an observational study. However, it is important to note that randomized experiments can provide stronger evidence of a causal relationship between variables.

In Order to Establish a Connection Between an Explanatory and Response