Cleaning data is the process of identifying and correcting or removing errors, inconsistencies, and inaccuracies in a dataset. It involves tasks like removing duplicate entries, handling missing values, and standardizing formats to ensure data quality.
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Data Validation: The process of ensuring that data meets certain criteria or rules defined by the user or system.
Data Preprocessing: A set of techniques used to prepare raw data for analysis by transforming it into a consistent format suitable for further processing.
Data points that significantly deviate from the normal pattern or distribution within a dataset. Identifying outliers is an important step in cleaning data as they can affect statistical analyses.