Without random assignment, which of the following can happen?
A)Naturally occurring confounding variables can result in an apparent relationship between the explanatory and response variables.
B)The results may not be able to be extended to a larger population.
C)Many people in the study will drop out because they aren't happy with the treatment they were assigned to.This will cause bias in the results.
D)None of the above.

Question

Quizplus · Accepted Answer

Without random assignment, there is a possibility that factors other than the explanatory variable may be responsible for the changes observed in the response variable. These factors are called confounding variables, and they can make it seem like there is a relationship between the explanatory and response variables, even when there is not. Therefore, choice A is the best answer. Choices B and C can also be an issue in some studies, but they are not directly related to the absence of random assignment.

Without Random Assignment, Which of the Following Can Happen