Episode 118 — Data Acquisition: Surveys, Sensors, Transactions, Experiments, and DGP Thinking

Описание: This episode teaches data acquisition as a source-driven decision, because DataX scenarios often require you to choose the right data collection approach and to reason about the data-generating process, since the DGP determines what conclusions and models are valid. You will learn the core acquisition modes: surveys that capture self-reported perceptions but carry response bias, sensors that provide high-frequency measurements but carry noise and missingness, transactions that reflect real behavior but are shaped by systems and policies, and experiments that support causal inference but require careful design and operational coordination. DGP thinking will be framed as asking, “What mechanism produced these values, what biases are baked in, and what is missing?” which guides how you clean data, select features, and interpret results. You will practice scenario cues like “survey response rate is low,” “sensor drops during extremes,” “transactions reflect policy changes,” or “randomization not possible,” and choose acquisition or analysis actions that preserve validity, such as adding validation questions, improving instrumentation, controlling for policy changes, or designing quasi-experiments when true experiments are infeasible. Best practices include defining the target and collection window clearly, ensuring consistent measurement definitions, capturing metadata about how data was collected, and designing sampling to represent the population you care about. Troubleshooting considerations include selection bias in who responds or who is observed, survivorship bias in long-running systems, measurement drift as instrumentation evolves, and ethical constraints that limit what you can collect or how you can intervene. Real-world examples include acquiring churn intent through surveys versus observing churn behavior through transactions, acquiring failure data through sensors versus maintenance logs, and acquiring treatment effects through controlled experiments versus natural rollouts. By the end, you will be able to choose exam answers that match acquisition method to objective, explain DGP implications for bias and inference, and propose realistic collection improvements that strengthen both modeling performance and decision validity. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.