Martin’s Service Station is considering entering the snowplowing business for the coming winter season. Martin can purchase either a snowplow blade attachment for the station’s pick-up truck or a new heavy-duty snowplow truck. After analyzing the situation, Martin believes that either alternative would be a profitable investment if the snowfall is heavy. Smaller profits would result if the snowfall is moderate, and losses would result if the snowfall is light. The following profits/losses apply.
The probabilities for the states of nature are P(s1) = .4, P(s2) = .3, and P(s3) = .3. Suppose that Martin decides to wait until September before making a final decision. Assessments of the probabilities associated with a normal (N) or unseasonably cold (U) September are as follows:
P(N) = .8 | P(s1 | N ) 5 .35 | P(s1 | U ) 5 .62 |
P(U) = .2 | P(s2 | N ) 5 .30 | P(s2 | U ) 5 .31 |
P(s3 | N ) 5 .35 | P(s3 | U ) 5 .07 |
- a. Construct a decision tree for this problem.
- b. W hat is the recommended decision if Martin does not wait until September? What is the
expected value ? - c. W hat is the expected value of perfect information?
- d. W hat is Martin’s optimal decision strategy if the decision is not made until the September weather is determined? What is the expected value of this decision strategy?
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Chapter 21 Solutions
STATISTICS F/BUSINESS+ECONOMICS-TEXT
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill