In practice,a control group is sometimes defined as the group that receives the current level of marketing activity,rather than a group that receives no treatment at all because it is difficult to reduce current marketing activities,such as advertising and personal selling,to zero.

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This statement is true as it is sometimes necessary to define a control group as the group that receives the current level of marketing activity in order to accurately measure the impact of a new marketing intervention. It is often difficult or impossible to completely eliminate all marketing activities, so using a group that receives the current level of activity as a control allows for a more realistic comparison.

In Practice,a Control Group Is Sometimes Defined as the Group