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The ages of commercial aircraft are normally distributed with a mean of 13.0 years and a standard deviation of 7.3627 years. What percentage of individual aircraft have ages between
10 years and 15 years? Assume that a random sample of 49 aircraft is selected and the mean age of the sample is computed. What percentage of sample means have ages between 10 years and 15 years?
The percentage of individual aircraft that have ages between 10 years and 15 years is nothing
%. (Round to the nearest integer as needed.)