Outlier-Robust Ratio-cum-Product Estimators of Finite Population Mean R package robustrcp version 0.1.0 Implements robust ratio-cum-product estimators using auxiliary medians for estimating the population mean under simple random sampling without replacement (SRSWOR). Provides analytical optimal tuning parameters, bias, Mean Squared Error (MSE), and Percent Relative Efficiency (PRE) evaluations. Software Depends: R (>= 3.5) Imports: stats Okechukwu J. Obulezi <oj.obulezi@unizik.edu.ng> Comprehensive R Archive Network (CRAN) Okechukwu J. Obulezi [aut, cre] (ORCID: <https://orcid.org/0000-0002-7753-1868>, Affiliation: Department of Statistics, Faculty of Physical Sciences, Nnamdi Azikiwe University, Awka, Nigeria) MIT + file LICENSE (https://CRAN.R-project.org/package=robustrcp/LICENSE) 2026-08-20 application/tgz https://CRAN.R-project.org/package=robustrcp doi:10.32614/CRAN.package.robustrcp