Which of the following is not a data reduction technique?a.Feature creationb.samplingc.Normalizationd.Dimensionality reduction

The option that is not a data reduction technique is c. Normalization.

Normalization is a data preparation technique, not a data reduction technique. It is used to change the values of numeric columns in the dataset to a common scale, without distorting differences in the ranges of values or losing information.

On the other hand, feature creation, sampling, and dimensionality reduction are all data reduction techniques.

• Feature creation is a process of creating meaningful new variables by transforming, aggregating, or interacting two or more variables.
• Sampling is a method used to select a subset of the population in order to infer about the population as a whole.
• Dimensionality reduction is the process of reducing the number of random variables under consideration, by obtaining a set of principal variables.