In the following data set, the attribute ?????? is the class label. the information gains for...
In the following data set, the attribute ?????? is the class label. the information gains for attributes ??? and ??????, respectively. If you are going to split the data set into smaller partitions, which of the two would you choose? Explain your answer.
Info(D) = -5/11 log (5/11) – 6/11 log (6/11) = 2.04
Info Age (D)= 4/11 I (0,4) + 5/11 I (3,2) + 2/11 I (2,0) = 0.43
Gain (Age) = Info(D) - Info salary (D) = 2.04 - 0.43= 1.61
Info(D) = -5/11 log (5/11) – 6/11 log (6/11) = 2.04
Info ?????? (D)= 4/11 I (1,3) + 5/11 I (2,3) + 2/11 I (2,0) = 1
Gain (S?????) = Info(D) - Info salary (D)= 2.04 - 1= 1.04
which of the two would we choose? Explain your answer.
data mining
Homework Answers
Answer:
To spilt the data in the decision tree we use some measures.One of them is Information Gain.
The Information gain(gain) for Age attribute is 1.61
The Information gain(gain) for Salary attribute is 1.04
We will choose the attribute with Highest Information gain as decision node.
In this case,We choose the Age attribute to spilt the data because,The Information gain is high compared to Salary attribute.
Thank you..
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