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Below are the eight actual values of the target variable in the train file. What is the entropy of the target variable?

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Below are the eight actual values of the target variable in the train file. What is the entropy of the target variable?

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[0, 0, 0, 1, 1, 1, 1, 1] 

Choose the correct answer.

  1. -(5/8 log(5/8) + 3/8 log(3/8))
  2. 5/8 log(5/8) + 3/8 log(3/8)
  3. 3/8 log(5/8) + 5/8 log(3/8)
  4. 5/8 log(3/8) – 3/8 log(5/8)

The target variable, in this case, is 1. 

The formula for calculating the entropy is:

Putting p=5 and n=8, we get 

Entropy = A = -(5/8 log(5/8) + 3/8 log(3/8))

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