1) Raw data by nature is not ideal for data analytics. Select one of the pre-ana

1) Raw data by nature is not ideal for data analytics. Select one of the pre-analysis processes, such as data selection, data cleansing, data categorizing, etc., and discuss what are the specific steps to make it suitable for data analysis. Please provide examples and be specific.
2) There are various modeling methodologies that are suited for different purposes. Discuss the differences between predictive, prescriptive, and descriptive analysis modeling, such as objectives, methodologies, and challenges. Please provide examples and be specific.
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