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c) What should the guaranteed delivery time be on packages so that 90% of the packages will be delivered before this time? Show some work or tell me which calculator function you are using and include the relevant numerical information. Round to 1 decimal place.

c) What should the guaranteed delivery time be on packages so that 90% of the packages will be delivered before this time? Show some work or tell me which calculator function you are using and include the relevant numerical information. Round to 1 decimal place.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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**Package Delivery:** Express Courier Service has found that the delivery time for packages is normally distributed with a mean of 15 hours and a standard deviation of 2 hours. **Questions:** a) Compute the Z value that corresponds to X = 19 hours *(round the answer to 2 decimal places)* b) For a package selected at random, what is the probability that it will be delivered in 19 hours or less? c) What should the guaranteed delivery time be on packages so that 90% of the packages will be delivered before this time? Show some work or tell me which calculator function you are using and include the relevant numerical information. Round to 1 decimal place.
Transcribed Image Text:**Package Delivery:** Express Courier Service has found that the delivery time for packages is normally distributed with a mean of 15 hours and a standard deviation of 2 hours. **Questions:** a) Compute the Z value that corresponds to X = 19 hours *(round the answer to 2 decimal places)* b) For a package selected at random, what is the probability that it will be delivered in 19 hours or less? c) What should the guaranteed delivery time be on packages so that 90% of the packages will be delivered before this time? Show some work or tell me which calculator function you are using and include the relevant numerical information. Round to 1 decimal place.
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