19. Guarantee: Package Delivery Express Courier Service has found that the delivery time for packages is normally

Question:

19. Guarantee: Package Delivery Express Courier Service has found that the delivery time for packages is normally distributed, with mean 14 hours and standard deviation 2 hours.

(a) For a package selected at random, what is the probability that it will be delivered in 18 hours or less?

(b) Inverse Normal Distribution 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 beyond the guaranteed time period.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

Understandable Statistics Concepts And Methods

ISBN: 9781305142909

11th Edition

Authors: Charles Henry Brase, Corrinne Pellillo Brase

Question Posted: