this is very well explained by @InnovArul above Understanding transform.Normalize( )
It depends which normalization method are you using.
Using normalization transform mentioned above will transform dataset into normalized range [-1, 1]
If dataset is already in range [0, 1] and normalized, you can choose to skip the normalization in transformation.
You can choose to normalize and get data in range [0, 1] by tweaking mean and std in transform