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7) The percentage of customers who are happy with their recent experience at CBDA Bank is believed to be 76%. An agent is curious to

7) The percentage of customers who are happy with their recent experience at "CBDA" Bank is believed to be 76%. An agent is curious to see if the percentage could be more. He takes a sample of 28 customers and finds that 23 of them stated that they were happy. Is this enough evidence that the percentage of happy customers is more than 76%

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