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The maximum distance (ft.) 9 drivers could read a road sign was recorded. It is reasonable to assumed these distances are normally distributed. The distances

The maximum distance (ft.) 9 drivers could read a road sign was recorded. It is reasonable to assumed these distances are normally distributed. The distances were: 440, 490, 600, 280, 540, 600, 240, 440, 360. Find a 90% confidence interval for the population mean. What is the LOWER BOUND? ______________________________

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