In what way a model changes when we do one iteration of the SFS algorithm?

Question

Answer

The model validation error always improves

Answer

The number of features used in the model decreases

Answer

The size of the state space decreases

Answer

The length of the bit string decreases

Answer

The length of the bit string increases

Answer

The number of features used in the model increases

Answer

The size of the state space increases

Answer

The number of nearest neighbors increases

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