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Suppose that the amount of time needed to change the oil on a car is normally distributed with a standard deviation of 5 times. The

Suppose that the amount of time needed to change the oil on a car is normally distributed with a standard deviation of 5 times. The amount of time to complete a random sample 10 oil changes was recorded and listed below. Determine the 95% confidence interval estimate of the population mean. 11,10,16,17,19,12,22,24,19,20

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