a. Since its a profit problem,we take the maximum payoff decision alternative for a given state of nature.
So, optimal decision strategy if perfect information was available is :
S1 :d1
S2: d1 or d2
S3: d2
b. Expected value with perfect information =P(s1) *pay off in d1+P(s2) *Pay off in d1 or d2 +P(s3)*Pay off in d2
=0.45*250+0.25*100+0.3*150
=182.5
c. Using the treeplan plugin for excel,we draw the decision tree as shown below :
The recommended decision without perfect information : d1
The expected value without perfect information(from the decision tree)=EVwoPI=167.5
d.Expected value of perfect information =Expected value with perfect information-Expected value without perfect information
EVPI=EVwPI-EVwoPI
=182.5-167.5=$15
Expected value of perfect information = 15
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