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Open-ended

Debugging & Failure Stories / Data Quality Issues

Missing Value Strategy Selection

HardMultiple Choice

Question

A feature in your medical dataset has 40% missing values. Analysis shows the missingness correlates with patient age - elderly patients have more missing values. What is the BEST approach?

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Motivation

Missing data handling significantly impacts model performance and fairness. Understanding the mechanism of missingness (MCAR, MAR, MNAR) is crucial for selecting appropriate imputation strategies.

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Questions from interviews at top companies

Google