GMATNinja wrote:
The passage itself is prettystraightforward:
- We have the results of the studies: "the tips left by customers who pay their bill in cash tend to be larger when the bill is presented on a tray that bears a credit-card logo." - notice the use of the word "tend". The psychologists are not suggesting that seeing a credit card (CC) logo on the tray will ALWAYS cause an increase in tip amount. In general, seeing a CC logo results in higher tip amounts.
- And we have an interpretation of those results: "simply seeing a credit-card logo makes many credit-card holders willing to spend more because it reminds them that their spending power exceeds the cash they have immediately available." - notice that this hypothesis only mentions "credit-card holders"
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