The ages of commercial aircraft are normally distributed with a mean of 13.5 years and a standard deviation of 7.3 years. what p
ercentage 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?
To find a missing side of a right triangle use the Pythagorean theorem A2+b2=c2 C is the hypotenuse (long side) Plug into the equation 11^2+b2=12^2 121+b2=144 So subtract 144-121 to get the missing side you get 23 Take the square root It will be 4.7 If they want it rounded X=5 If I had any mistakes in my answer I am sorry but everything should be correct
