The following restaurant chains have menu prices that are quite similar: Red Lobster, Grand Lux, Outback Steakhouse,

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The following restaurant chains have menu prices that are quite similar: Red Lobster, Grand Lux, Outback Steakhouse, Cheesecake Factory, and Longhorn. A management consultant needed to know whether there are differences in the amount of money spent per customer. Random samples of customers of each of the restaurants were drawn. For each, the amount of money spent per customer was recorded. Can we conclude from these data that there are differences between the restaurants?

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