What is the main downside of aggressively anonymizing a dataset (e.g., using Differential Privacy)?

If a store wants to identify the most popular product SKU sold during a holiday promotion, as in most frequent, which metric should they use?

Why can’t we directly calculate Y_{1} – Y_{0} for every individual in reality?

Which of the following is a typical “Business Use Case” for a Probability Mass Function (PMF)?

A colleague asks you to send them a spreadsheet containing row-level patient data so they can check a specific record. According to the “Security” protocol, which action is strictly forbidden?

According to the Law of Large Numbers, as the number of trials (n) increases:

You are analyzing “Server Downtime” events. You know that on any given day, the probability of a server crashing is 0.05. You want to model the number of crashes over a 30-day month. You decide to use a Binomial Distribution. What are the specific parameters (n, p) and what would the Expected Value of crashes be for the month?

What is the primary goal or essence of causal inference? 

You are merging two customer databases. In Database A, a customer is listed as “John Brown” at “123 Maple St.” In Database B, the same person is “J. Brown” at “123 Maple Street, Apt 4.” To successfully perform deduplication and merge these records into a single “Golden Record,” which step should your pipeline perform first?

You are a lead data engineer at a growing logistics firm. Your team is debating whether to implement strict validation checks at the point of data entry or to clean the data in batches every weekend. You cite the 1-10-100 Rule to justify investing in better “Prevention” rather than “Correction” or “Failure” management. If the cost of preventing a data entry error is $1, which of the following best describes the “100” in this rule?