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Introduction to Business Statistics
Quiz 19: Decision Theory
Path 4
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Question 21
Short Answer
Economy An investor has constructed the following payoff table for his profit in thousands of dollars.
The state of the economy will be
Invest in
company
Weak
(
0.2
)
Moderate
(
0.4
)
Strong
(
0.4
)
A
−
$
45
$
35
$
65
B
−
$
25
$
25
$
50
C
$
29
$
33
$
35
\begin{array}{l}\text { The state of the economy will be }\\\begin{array} { | c | c | c | c | } \hline \begin{array} { c } \text { Invest in } \\\text { company }\end{array} & \begin{array} { c } \text { Weak } \\\mathbf { ( 0 . 2 ) }\end{array} & \begin{array} { c } \text { Moderate } \\\mathbf { ( 0 . 4 ) }\end{array} & \begin{array} { c } \text { Strong } \\\mathbf { ( 0 . 4 ) }\end{array} \\\hline \mathrm { A } & - \$ 45 & \$ 35 & \$ 65 \\\mathrm {~B} & - \$ 25 & \$ 25 & \$ 50 \\\mathrm { C } & \$ 29 & \$ 33 & \$ 35 \\\hline\end{array}\end{array}
The state of the economy will be
Invest in
company
A
B
C
Weak
(
0.2
)
−
$45
−
$25
$29
Moderate
(
0.4
)
$35
$25
$33
Strong
(
0.4
)
$65
$50
$35
-What is the most the investor should be willing to pay for perfect information about the future state of the economy? ____________________ thousand
Question 22
Short Answer
State of Nature The following table displays the payoffs (in thousands of dollars)for five different decision alternatives under three possible states of nature:
State of Nature
Alternative
I
Prob.
=
0.2
II
Prob.
=
0.3
III
Prob.
=
0.5
A
$
110
$
80
−
$
20
B
$
90
$
85
$
10
C
$
45
$
65
$
45
D
$
30
$
60
$
65
E
$
10
$
25
$
70
\begin{array}{l}\text { State of Nature }\\\begin{array} { | c | c | c | c | } \hline \text { Alternative } & \begin{array} { c } \text { I } \\\text { Prob. } = \mathbf { 0 . 2 }\end{array} & \begin{array} { c } \text { II } \\\text { Prob. } = \mathbf { 0 . 3 }\end{array} & \begin{array} { c } \text { III } \\\text { Prob. } = \mathbf { 0 . 5 }\end{array} \\\hline \text { A } & \$ 110 & \$ 80 & - \$ 20 \\\text { B } & \$ 90 & \$ 85 & \$ 10 \\\text { C } & \$ 45 & \$ 65 & \$ 45 \\\text { D } & \$ 30 & \$ 60 & \$ 65 \\\text { E } & \$ 10 & \$ 25 & \$ 70 \\\hline\end{array}\end{array}
State of Nature
Alternative
A
B
C
D
E
I
Prob.
=
0.2
$110
$90
$45
$30
$10
II
Prob.
=
0.3
$80
$85
$65
$60
$25
III
Prob.
=
0.5
−
$20
$10
$45
$65
$70
-Calculate the expected opportunity loss for Alternative A (in thousands of dollars). ____________________ thousand
Question 23
Multiple Choice
The expected value of perfect information is the same as:
Question 24
Short Answer
A civic organization cooks and serves pancakes once a year as a fundraiser and has done so for the past 25 years.The pancake grill size requires pancakes to be cooked in advance of the orders for them.All labor is donated,but the electricity and pancake supplies cost $0.20 per pancake.Each pancake sells for $0.60.From past records it appears that the distribution of pancake sales is approximately normal with a mean of 3000 and a standard deviation of 450.Cooked,but unsold pancakes are given to anyone who wishes to take them.Find the number of cooked pancakes that will yield the maximum profit for the project. ____________________ pancakes Remove all commas from your answer before submitting.
Question 25
Short Answer
State of Nature The following table displays the payoffs (in thousands of dollars)for five different decision alternatives under three possible states of nature:
State of Nature
Alternative
I
Prob.
=
0.2
II
Prob.
=
0.3
III
Prob.
=
0.5
A
$
110
$
80
−
$
20
B
$
90
$
85
$
10
C
$
45
$
65
$
45
D
$
30
$
60
$
65
E
$
10
$
25
$
70
\begin{array}{l}\text { State of Nature }\\\begin{array} { | c | c | c | c | } \hline \text { Alternative } & \begin{array} { c } \text { I } \\\text { Prob. } = \mathbf { 0 . 2 }\end{array} & \begin{array} { c } \text { II } \\\text { Prob. } = \mathbf { 0 . 3 }\end{array} & \begin{array} { c } \text { III } \\\text { Prob. } = \mathbf { 0 . 5 }\end{array} \\\hline \text { A } & \$ 110 & \$ 80 & - \$ 20 \\\text { B } & \$ 90 & \$ 85 & \$ 10 \\\text { C } & \$ 45 & \$ 65 & \$ 45 \\\text { D } & \$ 30 & \$ 60 & \$ 65 \\\text { E } & \$ 10 & \$ 25 & \$ 70 \\\hline\end{array}\end{array}
State of Nature
Alternative
A
B
C
D
E
I
Prob.
=
0.2
$110
$90
$45
$30
$10
II
Prob.
=
0.3
$80
$85
$65
$60
$25
III
Prob.
=
0.5
−
$20
$10
$45
$65
$70
-Calculate the expected value of perfect information (EVPI)in thousands of dollars. ____________________ thousand
Question 26
Essay
When Jessica takes the direct route to work,she gets there in 25 minutes if no train is at the railroad crossing.When a train is using the crossing,her travel time is 10 minutes longer.Her alternative is a route that takes 32 minutes to travel,but has no traffic signals or other delays.Assuming that shorter transit times are more desirable,which route will Jessica select if she uses the maximin criterion? Explain.
Question 27
Short Answer
Scenario A company must decide whether or not to change its packaging now to a more environmentally safe material.The impact of the decision on profits depends on which future scenario develops.Scenario 1 is that the media does not focus heavily on concerns about packaging and no new laws requiring changes in packaging are passed.Under this scenario,the company will make $30 million if they change their packaging now,but will make $70 million if they do not change their packaging now.Scenario 2 is that the media does focus heavily on concerns about packaging and no new laws requiring changes in packaging are passed.Under this scenario,the company will make $45 million if they change their packaging now,but will make $50 million if they do not change their packaging now.Scenario 3 is that the media does focus heavily on concerns about packaging and new laws requiring changes in packaging are passed.Under this scenario,the company will make $55 million if they change their packaging now,but will make only $10 million if they do not change their packaging now.The probabilities of the three scenarios are 0.3,0.5,and 0.2,respectively. -What is the most the company should be willing to pay for a research study designed to reduce its uncertainty about media and legal developments concerning packaging? ____________________ million
Question 28
Short Answer
What is the most the firm would be willing to pay for a research study designed to reduce its uncertainty about market conditions? ____________________ million
Question 29
Short Answer
The manager of a grocery store pays 60 cents for each rose and sells them for $1.50 each.Roses left at the end of the day are discarded.The daily demand can be approximated by a normal distribution having a mean of 250 and a standard deviation of 40.To maximize his expected profit,how many roses should the manager buy before the market opens each day? ____________________ roses
Question 30
Essay
A California mango grower is considering the installation of a heating system to protect his crop in the event of frost during the coming winter.What would be the rows and columns of a payoff table applicable to this decision? Rows: Columns: