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TableĀ 2 All Electronics customer database with examples representing when the customer buys computer

From: Qualitative usability feature selection with ranking: a novel approach for ranking the identified usability problematic attributes for academic websites using data-mining techniques

RID Age Income Student credit_rating Class: buys_computer
1 Youth High No Fair No
2 Youth High No Excellent No
3 middle_aged High No Fair Yes
4 Senior Medium No Fair Yes
5 Senior Low Yes Fair Yes
6 Senior Low Yes Excellent No
7 middle_aged Low Yes Excellent Yes
8 Youth Medium No Fair No
9 Youth Low Yes Fair Yes
10 Senior Medium Yes Fair Yes
11 Youth Medium Yes Excellent Yes
12 middle_aged Medium No Excellent Yes
13 middle_aged High Yes Fair Yes
14 Senior Medium No Excellent No