Credit Approval Database



 

1. Sources:

Quinlan, "C4.5: Programs for Machine Learning", Morgan Kaufmann, Oct 1992

2. Information:

This file concerns credit card applications. All attribute names and values have been changed to meaningless symbols to protect confidentiality of the data.

+: 307 (44.5%)

--: 383 (55.5%)

3. Attribute Information:

A1: b(0), a(1).
A2: continuous.
A3: continuous.
A4: u(0), y(1), l(2), t(3).
A5: g(0), p(1), gg(2).
A6: c(0), d(1), cc(2), i(3), j(4), k(5), m(6), r(7), q(8), w(9), x(10), e(11), aa(12), ff(13).
A7: v(0), h(1), bb(2), j(3), n(4), z(5), dd(6), ff(7), o(8).
A8: continuous.
A9: t(0), f(1).
A10: t(0), f(1).
A11: continuous.
A12: t(0), f(1).
A13: g(0), p(1), s(2).
A14: continuous.
A15: continuous.
A16: +(0) ,-(10) (class attribute)

4. Database: 653 instances.

Car Database file has 653 - 37 = 616 instances. The data required for 100% accuracy is:

Class             #Required             #Actual

0 = +              1600                     307

10 = -             1600                     383

Total                3200                     653

There is not enough data in this database for 100% accuracy. As we will see, the DecisionMaker 2.5 will have an accuracy rate of 100% overall, which is more than expected.

The first 5 rows (All 0-class) and the last 5 rows (All 10-class) are used for question file. The Credit Database file has 606 instances. Below are the first 5 instances in the Database File:

Credit Database File:
0 32.08 4 0 0 6 0 2.5 0 1 0 0 0 360 0 0
0 33.17 1.04 0 0 7 1 6.5 0 1 0 0 0 164 31285 0
1 22.92 11.585 0 0 2 0 0.04 0 1 0 1 0 80 1349 0
0 54.42 0.5 1 1 5 1 3.96 0 1 0 1 0 180 314 0
0 42.5 4.915 1 1 9 0 3.165 0 1 0 0 0 52 1442 0

Below are the first 5 and the last 5 instances in the database, which will be used to test the DecisionMaker's accuracy:

Question                                                         Answer

0 30.83 0 0 0 9 0 1.25 0 0 1 1 0 202 0                 0
1 58.67 4.46 0 0 8 1 3.04 0 0 6 1 0 43 560          0
1 24.5 0.5 0 0 8 1 1.5 0 1 0 1 0 280 824              0
0 27.83 1.54 0 0 9 0 3.75 0 0 5 0 0 100 3             0
0 20.17 5.625 0 0 9 0 1.71 0 1 0 1 2 120 0           0
0 21.08 10.085 1 1 11 1 1.25 1 1 0 1 0 260 0         10
1 22.67 0.75 0 0 2 0 2 1 0 2 0 0 200 394                10
1 25.25 13.5 1 1 13 7 2 1 0 1 0 0 200 1                  10
0 17.92 0.205 0 0 12 0 0.04 1 1 0 1 0 280 750       10
0 35 3.375 0 0 2 1 8.29 1 1 0 0 0 0 0                      10

5. Results.

Set precision = 15.

Click "Integer/+ Predict" to get the following answer file:

=================== Beginning =====================

0 30.83 0 0 0 9 0 1.25 0 0 1 1 0 202 0

Possibility Confidence*Probability

0 8000

------------------------------------------------------

0

1 58.67 4.46 0 0 8 1 3.04 0 0 6 1 0 43 560

Possibility Confidence*Probability

0 180577

10 2500

------------------------------------------------------

0

1 24.5 0.5 0 0 8 1 1.5 0 1 0 1 0 280 824

Possibility Confidence*Probability

0 28340

10 16500

------------------------------------------------------

4

0 27.83 1.54 0 0 9 0 3.75 0 0 5 0 0 100 3

Possibility Confidence*Probability

0 542000

------------------------------------------------------

0

0 20.17 5.625 0 0 9 0 1.71 0 1 0 1 2 120 0

Possibility Confidence*Probability

0 5753

10 1125

------------------------------------------------------

2

0 21.08 10.085 1 1 11 1 1.25 1 1 0 1 0 260 0

Possibility Confidence*Probability

0 3244

10 151845

------------------------------------------------------

10

1 22.67 0.75 0 0 2 0 2 1 0 2 0 0 200 394

Possibility Confidence*Probability

10 512000

------------------------------------------------------

10

1 25.25 13.5 1 1 13 7 2 1 0 1 0 0 200 1

Possibility Confidence*Probability

0 974

10 1360

------------------------------------------------------

6

0 17.92 0.205 0 0 12 0 0.04 1 1 0 1 0 280 750

Possibility Confidence*Probability

0 20000

10 28000

------------------------------------------------------

6

0 35 3.375 0 0 2 1 8.29 1 1 0 0 0 0 0

Possibility Confidence*Probability

0 98750

10 256000

------------------------------------------------------

7

Precision of each number:

0.355556

=================== End ==========================

6. Analysis

As you can see, the answers are 100% correct, which is more than expected.