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The ages of commercial aircraft are normally distributed with a mean of 13.5 years and a...

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Basic Math

The ages of commercial aircraft are normally distributed with amean of 13.5 years and a standard deviation of 8.2933 years. Whatpercentage of individual aircraft have ages between 10 years and 16​years? Assume that a random sample of 81 aircraft is selected andthe mean age of the sample is computed. What percentage of samplemeans have ages between 10 years and 16 years?

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