GMAT Practice Question Set #15 (Question 43-45)

Critical Reasoning Question #44: Cash Tips in Presence of Credit Card Logo  
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In a study of 100 New York City restaurants, a control group had customers pay their bill in cash with the bill presented on a tray that bears no credit card logo. The experimental group had customers pay their bills in cash with the bill presented on a tray that does bear a credit card logo. Customers in the experimental group left larger tips on their bills. Consumer psychologists believe that the presence of the credit-card logo makes customers, many of whom have credit cards, willing to spend more because it reminds them that their spending power exceeds the cash they have immediately available.

Which of the following, if true, most strongly supports the psychologists' hypothesis?


In virtually all of the cases in the studies, the patrons who paid bills in cash did not possess credit cards.


In general, restaurant patrons who pay their bills in cash leave larger tips than do those who pay by credit card.


The effect noted in the studies is not limited to patrons who have credit cards.


Patrons who are under financial pressure from their credit-card obligations tend to tip less when presented with a restaurant bill on a tray with a credit-card logo than when the tray has no logo.


The percentage of restaurant bills paid with a given brand of credit card increases when that credit card's logo is displayed on the tray with which the bill is prepared.

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