Question: 8. It is often said that 80% of the work done on predictive data analytics projects is done in the Business Understanding, Data Understanding, and

8. It is often said that 80% of the work done on predictive data analytics projects is done in the Business Understanding, Data Understanding, and Data Preparation phases of CRISP-DM, and just 20% is spent on the Modeling, Evaluation, and Deployment phases. Why do you think this would be the case?

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