A.
Decision Table:
State of nature | ||||
Good | Fair | Bad | ||
Alternative | Stocks | 3000 | 1600 | 0 |
Bank | 2000 | 2000 | 2000 | |
Probability | 0.4 | 0.4 | 0.2 |
B.
EMV(Stocks) = 0.4*3000 + 0.4*1600 + 0.2*0
= 1840
EMV(Bank) = 0.4*2000 + 0.4*2000 + 0.2*2000
= 2000
Best decision using EMV = Bank
C.
Opportunity Loss Table is created by subtracting payoff of each state of nature from the best payoff of that state. e.g. for stock and good it is calculated by 3000 - 3000 = 0 and for bank and good it is calculated by 3000-2000 = 1000 and so on.
Opportunity Loss Table:
State of nature | |||||
Good | Fair | Bad | Expected Regret | ||
Alternative | Stocks | 0 | 400 | 2000 | 560 |
Bank | 1000 | 0 | 0 | 400 | |
Probability | 0.4 | 0.4 | 0.2 |
D.
EOL will be calculated in the same way as EMV was calculated and is given in the above table.
Best Decision = Bank (As the regret is less)
E.
ERPI = 3000*0.4 + 2000*0.4 + 2000*0.2
= 2400
EREV = Largest EMV
= 2000
ERPI = 2400- 2000
= 400
F.
Maximin Approach = maximizes the minimum payoff
Table:
State of nature | |||||
Good | Fair | Bad | Minimum in a row | ||
Alternative | Stocks | 3000 | 1600 | 0 | 0 |
Bank | 2000 | 2000 | 2000 | 2000 |
Thus Optimal decision is Bank as the minima is maximized.
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