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Describe a scenario where PCA might not be a good choice for dimension reduction. What limitation of PCA does your example highlight?

What does a histogram visualize?

In outlier detection, what is the trade-off between detecting true anomalies and avoiding false positives? Describe one strategy to balance this trade-off.

Which of the following 3-itemsets would be invalid under Apriori, given that {M, E}, {E, P}, and {M, P} are frequent 2-itemsets?

Suppose you trained a classifier with 95% accuracy, but it performs poorly on new data. What could be the cause, and how would you address it?

You are given frequent 2-itemsets: {Bread, Milk}, {Bread, Eggs}, and {Milk, Eggs}. Based on the Apriori algorithm, which 3-itemset would be generated and why?

DBSCAN is especially effective at:

Which Python library is commonly used for data manipulation?

In the A Priori algorithm, which of the following is not required?

  The order of draw is important to prevent cross-contamination of additives.