Presence of duplicate records can affect the quality of data in data mining.

Question

Quizplus · Accepted Answer

Duplicate records can distort the analysis results and produce inaccurate statistics, patterns, and relationships. Data mining algorithms may treat duplicate records as multiple instances of the same event, which can result in overemphasizing the significance of certain attributes and biases in the training data. Therefore, it is essential to remove duplicates before performing data mining operations.

Presence of Duplicate Records Can Affect the Quality of Data