Refer to Exercise 6.7. Data from Exercise 6.7 A special delivery truck travels from point A to
Question:
Refer to Exercise 6.7.
Data from Exercise 6.7
A special delivery truck travels from point A to point B and back over the same route each day. There are three traffic lights on this route. Let X be the number of red lights the truck encounters on the way to delivery point B and let Y be the number of red lights the truck encounters on the way back to delivery point A. A traffic engineer has determined the joint probability distribution of X and Y shown in the table.
a. On the average, how many red lights should the truck expect to encounter on the way to delivery point B, i.e., what is E(X)?
b. The total number of red lights encountered over the entire route—that is, going to point B and back to point A—is (X + Y) . Find E (X + Y).
Step by Step Answer:
Xx PYy 0 1 2 3 0 001 002 007 001 011 Yy 1 003 006 010 006 025 2 005 ...View the full answer
Statistics For Engineering And The Sciences
ISBN: 9781498728850
6th Edition
Authors: William M. Mendenhall, Terry L. Sincich
