A(n)________ is a set of customers who are enlisted to give responses to questions or to provide data repeatedly over a period of time.

Question

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A panel is a group of individuals who are recruited to provide responses or data over a period of time. They are typically used for market research studies to track changes in opinions or behaviors over time. Control groups and experiments are specific types of research designs, while a tracking study is a broader term that may refer to any research study that involves tracking a particular variable over time.

A(n)________ Is a Set of Customers Who Are Enlisted to Give