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A restaurant chain claims that the waiting time for customers is 8 minutes with a population standard deviation of 1 minute. The quality control department

A restaurant chain claims that the waiting time for customers is 8 minutes with a population standard deviation of 1 minute. The quality control department found in a sample of 50 customers that the mean waiting time was 2.75 minutes. At the 0.05 level of significance, can you conclude that the mean waiting time is less than 3 minutes? Demonstrate the procedure and explain your answer.

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