A questionnaire on a table at a shopping mall was completed by 100 shoppers. The results were used to claim that the average amount of money spent by Americans increased from the previous year. Explain why this claim is questionable.

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The Answer of A questionnaire on a table at a shopping mall was completed by 100 shoppers. The results were used to claim that the average amount of money spent by Americans increased from the previous year. Explain why this claim is questionable.

A Questionnaire on a Table at a Shopping Mall Was