Which of the following is not a data reduction technique?a.Feature creationb.samplingc.Normalizationd.Dimensionality reduction
Question
Which of the following is not a data reduction technique?
a. Feature creation
b. Sampling
c. Normalization
d. Dimensionality reduction
Solution
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.
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