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Math and Logic

A Little Big Survey

Jack, the owner of the restaurant chain BrillYum, would like to start offering home-delivered meals. He asked 200200 randomly selected customers for their opinion and 121121 responded that they'd use such services. Jack knows that these results don't let him conclude anything about the percentage of all customers interested in meal delivery with 100%100\% certainty. What can he say about this percentage with 95%95\% certainty? Keep reading to learn more, or see another example in today's challenge.

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