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We are analyzing the average processing time, , for customer service requests at a company. From a random sample of 36 requests, the average time

We are analyzing the average processing time, , for customer service requests at a company. From a random sample of 36 requests, the average time is 12 hours with a standard deviation of 18 hours. (a) Calculate a two-sided 99% confidence interval for . (b)Calculate a 99% lower confidence bound for

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