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

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

The ages of commercial aircraft are normally distributed with a mean of 13.5 years and a standard deviation of 87.8

years. What percentage of individual aircraft have ages greater than 15years? Assume that a random sample of 81

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 _____ %

math Statistics-And-Probability

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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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