A nutritionist wanted to find out if coffee and tea, as served in restaurants, differed in caffeine
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A nutritionist wanted to find out if coffee and tea, as served in restaurants, differed in caffeine content. She went to 30 restaurants. In 15 randomly selected restaurants, she ordered coffee; in the other 15 restaurants, she ordered tea. What statistical test should the nutritionist use to see if coffee and tea differ in mean caffeine content?
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