Express Courier Service has found that the delivery time for

Last updated: 11/29/2023

Express Courier Service has found that the delivery time for packages is normally distributed with mean 14 hours and standard deviation 3 hours USE SALT a For a package selected at random what is the probability that it will be delivered in 18 hours or less Round your answer to four decimal places b What should be the guaranteed delivery time on all packages in order to be 95 sure that the package will be delivered before this time Hint Note that 5 of the packages will be delivered at a time the guaranteed time period Round your answer to one decimal place hr