Tag
missing-data
- Apr 29, 2025 Mean Imputation and the Variance It Removes Substituting the column mean for a missing value preserves the mean exactly and shrinks the variance and the covariance, changing coefficients, standard errors, and fit. machine learning
- Dec 16, 2024 Alerting on Absent and Stale Data Why a missing series makes an alert rule evaluate to nothing rather than to health, how staleness markers and absence functions expose the difference, and why a firing alert can silently turn into a false resolution. observability