What is the initial step in data analysis where raw data is cleaned, formatted, and transformed to prepare it for study?

What is the initial step in data analysis where raw data is cleaned, formatted, and transformed to prepare it for study?

• A. Preprocessing
• B. Data cleaning
• C. Machine learning
• D. Data

Answer: (A)

Preparing raw data for analysis by cleaning, formatting, and transforming it is done in preprocessing. This step sets up the data so analyses and models can run reliably by addressing missing values, inconsistencies, and scaling or encoding features. Data cleaning alone focuses only on tidying up the data, but preprocessing covers the broader set of operations that ready data for study. Machine learning is something you do after the data is prepared, and data refers to the raw material rather than a process.

Preparing raw data for analysis by cleaning, formatting, and transforming it is done in preprocessing. This step sets up the data so analyses and models can run reliably by addressing missing values, inconsistencies, and scaling or encoding features. Data cleaning alone focuses only on tidying up the data, but preprocessing covers the broader set of operations that ready data for study. Machine learning is something you do after the data is prepared, and data refers to the raw material rather than a process.