When performing regression or classification which of the following is the correct way to prepr...........

Computer Science (CUET) MCQ practise

When performing regression or classification, which of the following is the correct way to preprocess the data?

Normalize the data -> PCA -> training

PCA -> normalize PCA output -> training

Normalize the data -> PCA -> normalize PCA output -> training

None of the above

You need to always normalize the data first. If not, PCA or other techniques that are used to reduce dimensions will give different results.

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