Often, we do not know at the start of an experiment what extraneous variables could affect our results. The best means of controlling for unknown sources of extraneous variables is:
A) Random selection
B) Random assignment
C) Sequencing
D) Analysis of covariance

Question

Quizplus · Accepted Answer

Random assignment helps ensure that any unknown extraneous variables are evenly distributed across experimental groups, minimizing their potential impact on the results.

Often, We Do Not Know at the Start of an Experiment