In an experimental design, volunteers are placed into the experimental group or the control group based on a flip of a coin. This method illustrates:

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Random assignment refers to the process of randomly assigning participants to either the experimental or control group. This is often done to ensure that the two groups are similar in terms of their characteristics and eliminate the potential for selection bias. The use of a coin flip is a common way to achieve random assignment in experimental designs. Statistical significance refers to the likelihood that the results of an experiment are unlikely to have occurred by chance, and is not directly related to participant assignment. Random sampling refers to the process of randomly selecting participants from a population, while matched samples involve selecting two groups that are matched on specific characteristics (e.g. age, gender, etc.).

In an Experimental Design, Volunteers Are Placed into the Experimental