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Jordan is the manager of a used bookstore. He wants to estimate the average amount a customer spends per visit. A random sample of 90

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Jordan is the manager of a used bookstore. He wants to estimate the average amount a customer spends per visit. A random sample of 90 customers' receipts gave a mean of = = $6.90 with standard deviation o = $2.55. Find a 90% confidence interval for the average amount spent by all customers. Round each number in the interval to the nearest hundredth. . Previous Next *

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