Question: Note: It is not only dimension reductions. What else would it be? You are assigned to read a study that finds data transformation can help

Note: It is not only dimension reductions. What else would it be?

You are assigned to read a study that finds data transformation can help customer churn prediction. Identify data transformation(s) used in that study.

Discretization of continuous numerical attribute

Aggregation to lower granularity and reduce data size

Sampling to reduce number of records

Dimension reduction

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