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A recent study by the Operations Department concluded that the average waiting time was now down to 5.5 minutes with a standard deviation equal to 2.0 minute. Deciding to double check these results, she had her assistant randomly sampled 25 customers and recorded the time they had to wait. The assistant found that the average wait in the sample was 6.3 minutes. What is the probability that the sample mean would be 6.1 or more?

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