A representative group of individuals or households that keeps track of purchases made or products consumed over a given period of time is called a scanner.

Name: A representative group of individuals or households that keeps track of purchases made or products consumed over a given period of time is called a scanner.
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Question

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A representative group of individuals or households that tracks purchases or consumption is called a "panel," not a "scanner." A scanner is a device used to read barcodes.

A Representative Group of Individuals or Households That Keeps Track