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A number of restaurants feature a devicethat allows credit card users to swipe their cards atthe table. It allows the user to specify a percentageor a dollar amount to leave as a tip In an experiment

A number of restaurants feature a devicethat allows credit card users to swipe their cards atthe table. It allows the user to specify a percentageor a dollar amount to leave as a tip. In an experimentto see how it works, a random sample of credit cardusers was drawn. Some paid the usual way, and someused the new device. The percent left as a tip wasrecorded and listed below. Can we infer that usersof the device leave larger tips?Usual10.3 15.2 13.0 9.9 12.1 13.4 12.2 14.9 13.2 12.0Device13.6 15.7 12.9 13.2 12.9 13.4 12.1 13.9 15.7 15.4 17.4

Jun 22 2020 View more View Less

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