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An online used car company sells second-hand cars. For 30 randomly selected transactions, the mean price is 2300 dollars. Part a) Assuming a population standard

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An online used car company sells second-hand cars. For 30 randomly selected transactions, the mean price is 2300 dollars. Part a) Assuming a population standard deviation transaction prices of 270 dollars, obtain a 99% confidence interval for the mean price of all transactions. Please carry at least three decimal places in intermediate steps. Give your final answer to the nearest two decimal places. Confidence interval

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