The ages of commercial aircraft are normally distributed with a mean of 13.0

years and a standard deviation of 6.9491

years. What percentage of individual aircraft have ages between 9

years and 16

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 9

years and 16

years?

The percentage of individual aircraft that have ages between 9

years and 16

years is ?

Round to the nearest integer as needed.