The ages of commercial aircraft are normally distributed with a mean of 13.0 years and a standard deviation of 7.5 years. What percentage of individual aircraft have ages greater than 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 greater than 15 years?

The percentage of individual aircraft that have ages greater than 15 years is ()%.

Answer rating: 100% (QA)

Given that mean M 130 years Standood deviationr 72 y... View the full answer