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  3. question 2 the times that a cashier spends serving individual...

Question: question 2 the times that a cashier spends serving individual...

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QUESTION 2 The times that a cashier spends serving individual customers are independent random variables with mean 2.5 minutes and standard deviation 2 minutes. What is approximate probability that (a) the average time to serve a sample of 64 customers is within 0.5 minutes of the true mean above? (b) it will take more than 4 hours to process the orders of 100 customers?

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