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Purchase Behavior for Big-Screen Televisions
Planned To Purchase
Actually Purchased
Yes
No
Total
200
50
250
100
650
750
300
700
1000
In the above table, households are classified according to whether they planned to purchase and whether they actually purchased big-screen televisions. Draw the Decision Tree for this example.
Purchase Behavior Regarding Plasma Screen Televisions and DVR.
Purchased Plasma Screen
Purchased DVR
Plasma Screen
38
42
80
Not Plasma Screen
70
150
220
108
192
(Note: the probability formulas for question 2 are listed below)
The probability of A given B is equal to the probability of A and B divided by the probability of B.
P(A/B) = P(A and B)/P(B)
The probability of B given A is equal to the probability of A and B divided by the probability of A.
P(B/A) = P(A and B)/P(A)
Where:
P(A and B) = joint probability of A and B
P(A) = marginal probability of A
P(B) = marginal probability of B
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