Question

it is the main technique employed for data selection​

Answer 1

Answer:

Sampling is the main technique that we use for data selection. It's used almost always for preliminary investigation of the data but it's often used even for the final data analysis, even in data science.

Answer 2

Answer:

The main technique employed for data selection is Sampling.

Explanation:

• It is frequently utilised for both the first study of the data and the comprehensive analysis of the data, because acquiring the whole set of data is difficult, statisticians sample is either excessively costly or time-consuming.
• Data mining employs sampling because processing the the cost or time required to obtain the whole collection of desired data consuming.