Wheel thickness on a train is random because wear and tear causes the wheel to wear down. The distribution of wheel thickness is known to have a standard deviation of 0.52 inches. The average wheel thickness tells you how old the train is. A random sample of 22 wheels on the Brazos Express Train found an average wheel thickness of 8.29 inches. Find a 99.8% confidence interval for the true average wheel thickness on the Brazos Express. Use 4 decimal

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