Information and IdeasVery hardFinding that weakens a claim about an effect
Information and Ideas practice question
A shop claims that its loyalty card increased how often customers visit, since cardholders visit twice as often as non-cardholders.
Which finding, if true, would most directly weaken the shop's claim?
- A. The customers who signed up for the card were already visiting twice as often as other customers before the card was introduced.Correct
- B. The card is free to obtain.
- C. Cardholders say they like the card.
- D. The shop's total sales rose last year.
Answer: A. The customers who signed up for the card were already visiting twice as often as other customers before the card was introduced.
If frequent visitors were the ones who took the card, the card didn't create the difference.
Why the other answers are wrong
- B. The card is free to obtain.
- Cost doesn't bear on the effect.
- C. Cardholders say they like the card.
- Liking it doesn't show it changed behaviour.
- D. The shop's total sales rose last year.
- Total sales could rise for many reasons.
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