Summary
In this chapter, we presented the content of data quality and its usage in the AI and LLM era first. We then explored several examples of good and bad data quality. Lastly, we showed how to write Python code to practice good data quality. Data quality refers to the overall utility of data based on attributes such as accuracy, completeness, reliability, relevance, and timeliness. It is an assessment of how well-suited data is for making decisions, driving processes, and achieving business objectives.
We hope you can grasp the features of good and poor data quality in your practical applications.
In the next chapter, several topics related to data quality will be presented. You will learn about the connections among data, such as correlation, causation, bias, and so on.