The main advantage of testing multiple factors in a single experiment or study is:

Question

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The main advantage of testing multiple factors in a single experiment or study is that it shows interaction effects between factors.
Key Takeaway: In the design of experiments, the simultaneous inclusion of multiple factors in an experiment leads to a study of interactions between them. For example, if a study is examining the effect of increased caloric intake and less exercise on weight gain, an interaction effect between caloric intake and exercise may emerge. Multifactor research design tends to be costly and time consuming, and require significant statistical skill to analyze data.

The Main Advantage of Testing Multiple Factors in a Single