Bundle: Modern Business Statistics with Microsoft Office Excel, Loose-Leaf Version, 6th + MindTap Business Statistics, 2 terms (12 months) Printed Access Card
Bundle: Modern Business Statistics with Microsoft Office Excel, Loose-Leaf Version, 6th + MindTap Business Statistics, 2 terms (12 months) Printed Access Card
6th Edition
ISBN: 9781337589383
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: Cengage Learning
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Chapter 20.4, Problem 16E

To save on expenses, Rona and Jerry agreed to form a carpool for traveling to and from work. Rona preferred to use the somewhat longer but more consistent Queen City Avenue. Although Jerry preferred the quicker expressway, he agreed with Rona that they should take Queen City Avenue if the expressway had a traffic jam. The following payoff table provides the one-way time estimate in minutes for traveling to and from work.

  State of Nature
  Expressway Open Expressway Jammed
Decision Alternative s1 s2
Queen City Avenue, d1 30 30
Expressway, d2 25 45

Based on their experience with traffic problems, Rona and Jerry agreed on a .15 probability that the expressway would be jammed.

In addition, they agreed that weather seemed to affect the traffic conditions on the expressway. Let

C = clear

O = overcast

R = rain

The following conditional probabilities apply.

P(C | s1) 5= .8 P(O | s1) = .2 P(R | s1) = .0
P(C | s2) = .1 P(O | s2) = .3 P(R | s2) = .6
  1. a. Use Bayes’ theorem for probability revision to compute the probability of each weather condition and the conditional probability of the expressway open, s1, or jammed, s2, given each weather condition.
  2. b. Show the decision tree for this problem.
  3. c. W hat is the optimal decision strategy, and what is the expected travel time?
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Please Help me ... Note:  c=7 , d=6
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