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Eliardo G. Costa

Publications and source records attributed to Eliardo G. Costa.

3 recordsLinked to original sources
arXiv2023

Bayesian inference for the Net Promoter Score

The Net Promoter Score is a simple measure used by several companies as indicator of customer loyalty. Studies that address the statistical properties of this measure are still scarce and none of them considered the sample size determination problem. We adopt a Bayesian approach to provide point and interval estimators for the Net Promoter Score and discuss the determination of the sample size. Computational tools were implemented to use this methodology in practice. An illustrative example with data from financial services is also presented.

stat.ME↗
arXiv2020

Optimal sample size for the Birnbaum-Saunders distribution under a decision-theoretic approach

The Birnbaum-Saunders distribution has been widely applied in several areas of science and although several methodologies related to this distribution have been proposed, the problem of determining the optimal sample size for estimating its mean has not yet been studied. For this purpose, we propose a methodology to determine the optimal sample size under a decision-theoretic approach. In this approach, we consider loss functions for point and interval inference. Finally, computational tools in the R language were developed to use in practice.

stat.ME↗