Question
Your company ships a lot of packages that need to be deliveredquickly and on short notice. In the past, you have used Speedy AirDelivery Service,
Your company ships a lot of packages that need to be deliveredquickly and on short notice. In the past, you have used Speedy AirDelivery Service, but you are beginning to receive complaints fromcustomers who say they are not receiving their packages on time.Speedy advertises that it delivers packages anywhere in the U.S. inan average of two days. For purposes of this discussion we willassume that delivery times are normally distributed and that thestandard deviation of package deliveries for Speedy is 0.5days.
1. If one package is selected atrandom, what is the probability that the delivery time will be 2.3days or more?
2. If 25 packages are selected atrandom, what is the probability that the average delivery time willbe 2.3 days or more?
Step by Step Solution
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Step: 1
1 23 days is 15 standard deviations above the mean Px 23 1 Px 23 Px 23 ...
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Vector Mechanics for Engineers Statics and Dynamics
Authors: Ferdinand Beer, E. Russell Johnston, Jr., Elliot Eisenberg, William Clausen, David Mazurek, Phillip Cornwell
8th Edition
73212229, 978-0073212227
