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Logical Decisions - Classweb

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A uniform distribution is defined by an upper and lower limit.<br />

Any level between the two limits is equally likely to occur.<br />

Assume that we feel that the "Resale Value" for the "Wolf" truck is<br />

equally likely to be anywhere between 60 and 70 percent.<br />

5. Enter 70 as the "Upper Bound."<br />

6. Enter 60 as the "Lower Bound."<br />

7. Click "OK” twice to return to the Matrix view.<br />

The cell for "Resale Value" for the "Wolf" truck should now be<br />

highlighted in red. This indicates that you can't directly modify<br />

this cell. You must make any new changes in the probability<br />

dialog box.<br />

Next we will enter the level for the "Mountain Lion" truck.<br />

Assume we think that the resale value for this truck has a Normal<br />

distribution (bell shaped curve) with a mean of 60 percent and a<br />

standard deviation of 5 percent. To enter this distribution:<br />

1. In the Matrix view, double-click on the "Resale Value"<br />

cell for the "Mountain Lion" truck.<br />

2. LDW will display the probability dialog box.<br />

3. Click on the "Normal Distribution" radio button.<br />

4. LDW will display a dialog box where you enter the<br />

parameters for the Normal distribution.<br />

5. Enter a Mean of 60.<br />

6. Enter a Standard Deviation of 5.<br />

7. Click "OK" twice to return to the Matrix view.<br />

.<br />

Finally, we'll define the probability distribution for the "Coyote"<br />

truck as a discrete distribution with three possible outcomes. The<br />

possibilities are:<br />

Probability % Resale Value<br />

0.25 50<br />

0.50 60<br />

0.25 65<br />

To enter this distribution:<br />

Section 5 -- Advanced Tutorial 5-7

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