What’s the difference between dimensionality reduction
1. What’s noise? How can noise be reduced in a dataset? 2. Define outlier. Describe 2 different approaches to detect outliers in a dataset. 3. Give 2 examples in which aggregation is useful. 4. What’s stratified sampling? Why is it preferred? 5. Provide a brief description of what Principal Components Analysis (PCA) does. [Hint: See […]
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