Imagine we are training a decision tree, and we are at a node. Each data point is (X1, X2,X3,Y), where X1,X2, and X3 are independent variables, and Y is the dependent variable. The data are shown below. Let us train a decision tree with this data. Let's call this tree T1. What feature will we split on at the root? X1 X2 X3 Y 1 1 1 1 1 1 1 X1 X2 X1 or X2 X3

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Imagine we are training a decision tree, and we are at a node. Each data point is (X1,
X2,X3,Y), where X1,X2, and X3 are independent variables, and Y is the dependent
variable. The data are shown below. Let us train a decision tree with this data. Let's call
this tree T1. What feature will we split on at the root?
X1
X2
X3
Y
1
1
1
1
1
1
1
1
1
X1
X2
X1 or X2
O X3
Transcribed Image Text:Imagine we are training a decision tree, and we are at a node. Each data point is (X1, X2,X3,Y), where X1,X2, and X3 are independent variables, and Y is the dependent variable. The data are shown below. Let us train a decision tree with this data. Let's call this tree T1. What feature will we split on at the root? X1 X2 X3 Y 1 1 1 1 1 1 1 1 1 X1 X2 X1 or X2 O X3
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