Zoraida F. Rico

activity

20222026

most citedImproved covariance estimation: optimal robustness and sub-Gaussian guarantees under heavy tails

2 citations · 2 across the 5 of their papers we have counts for

collaborators

Showing 2025 · math.STShow all

2 papers · 2 filters

math.ST2025

Robust, sub-Gaussian mean estimators in metric spaces

Daniel Bartl, Gabor Lugosi, Roberto Imbuzeiro Oliveira +1

Estimating the mean of a random vector from i.i.d. data has received considerable attention, and the optimal accuracy one may achieve with a given confidence is fairly well underst…

math.ST2025

Finite-sample properties of the trimmed mean

Roberto I. Oliveira, Paulo Orenstein, Zoraida F. Rico

The trimmed mean of $n$ scalar random variables from a distribution $P$ is the variant of the standard sample mean where the $k$ smallest and $k$ largest values in the sample are d…