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Description of the Dataset:
THIS CREDIT DATA ORIGINATES FROM QUINLAN (see below).
1. Title: Australian Credit Approval
2. Sources:
(confidential)
Submitted by quinlan@cs.su.oz.au
3. Past Usage:
See Quinlan,
* "Simplifying decision trees", Int J Man-Machine Studies 27,
Dec 1987, pp. 221-234.
* "C4.5: Programs for Machine Learning", Morgan Kaufmann, Oct 1992
4. Relevant Information:
This file concerns credit card applications. All attribute names
and values have been changed to meaningless symbols to protect
confidentiality of the data.
This dataset is interesting because there is a good mix of
attributes -- continuous, nominal with small numbers of
values, and nominal with larger numbers of values. There
are also a few missing values.
5. Number of Instances: 690
6. Number of Attributes: 14 + class attribute
7. Attribute Information: THERE ARE 6 NUMERICAL AND 8 CATEGORICAL ATTRIBUTES.
THE LABELS HAVE BEEN CHANGED FOR THE CONVENIENCE
OF THE STATISTICAL ALGORITHMS. FOR EXAMPLE,
ATTRIBUTE 4 ORIGINALLY HAD 3 LABELS p,g,gg AND
THESE HAVE BEEN CHANGED TO LABELS 1,2,3.
A1: 0,1 CATEGORICAL
a,b
A2: continuous.
A3: continuous.
A4: 1,2,3 CATEGORICAL
p,g,gg
A5: 1, 2,3,4,5, 6,7,8,9,10,11,12,13,14 CATEGORICAL
ff,d,i,k,j,aa,m,c,w, e, q, r,cc, x
A6: 1, 2,3, 4,5,6,7,8,9 CATEGORICAL
ff,dd,j,bb,v,n,o,h,z
A7: continuous.
A8: 1, 0 CATEGORICAL
t, f.
A9: 1, 0 CATEGORICAL
t, f.
A10: continuous.
A11: 1, 0 CATEGORICAL
t, f.
A12: 1, 2, 3 CATEGORICAL
s, g, p
A13: continuous.
A14: continuous.
A15: 1,2
+,- (class attribute)
8. Missing Attribute Values:
37 cases (5%) HAD one or more missing values. The missing
values from particular attributes WERE:
A1: 12
A2: 12
A4: 6
A5: 6
A6: 9
A7: 9
A14: 13
THESE WERE REPLACED BY THE MODE OF THE ATTRIBUTE (CATEGORICAL)
MEAN OF THE ATTRIBUTE (CONTINUOUS)
9. Class Distribution
+: 307 (44.5%) CLASS 2
-: 383 (55.5%) CLASS 1
10. There is no cost matrix.
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