Vita e Pensiero
A Comparison of Variable Selection Methods in Competing
Risks Models for Business Failures
digital
Year:
2022
The statistical techniques that are applied to the analysis and prediction of the failure of business enterprises include regression modelling of hazard functions. Because a large number of financial variables are available as potential predictors, it is necessary to choose an appropriate variable selection procedure in this modelling...
On the Kuiper Test for Benford’s Law
digital
Year:
2022
We show that the standard Kuiper test is inappropriate when testing Benford’s law. The Kuiper cumulative distribution function, indeed, shows unreasonable large deviations, up to about 60%, from the ones observed in Monte Carlo simulations...
R Shiny Web Applications in the Sports Field:
A Scoping Review
digital
Year:
2025
R shiny is a popular open-source platform for developing web applications using R, and its use in sports has grown rapidly in recent years. The aim of this review is to summarize the current state of the art on the use of R shiny in sports and to identify their benefits and limitations. From various databases and repositories, a total of 310 applications, created in or after 2014, were detected. Of these, 48.7% have been developed by a US based developer, 91.03% include a database, 70% aim to perform a statistical analysis, and 1% come from a scientific article...
Finite population inference for skewness measures
digital
Year:
2022
In this article we consider Bowley’s skewness measure and the Groeneveld-Meeden b3 index in the context of finite population sampling. We employ the functional delta method to obtain asymptotic variance formulae for plug-in estimators and propose corresponding variance estimators...
Assessing the Quality of Life of Patients with Epidermolysis Bullosa: Application of the Delphi Method to Develop a Patient-Centred Questionnaire
digital
Year:
2024
Epidermolysis Bullosa is a rare disease that seriously affects the Quality of Life (QoL) of patients and their caregivers and can sometimes constitute an unbearable burden for them. The primary aim of this study was to focus on the patients’ experience, capture their point of view and understand their needs in order to develop a QoL questionnaire...
Application of Nonparametric Stability Methods in Chickpea (Cicer Arietinum L.) Crop Under Diverse Environments
digital
Year:
2022
Apply different nonparametric tests for genotype x environment interactions (GEI) on 27 chickpea genotypes evaluated for Fusarium wilt across 10 environments. Results of nonparametric tests of Bredenkamp and Van der de kroon and parametric test of combined analysis of variance across environments indicated the presence of both crossover and non-crossover interactions of GEI...
A Data-Driven Approach to Multivariate Monte Carlo Simulation
digital
Year:
2022
We describe a model-free, fully data-driven approach to simulating random draws from a continuous multivariate distribution. The proposed technique is an extension of the smoothed bootstrap which explicitly accounts for local differences in the dispersion of individual data points in the sample. Results from a number of simulation experiments suggest that in many cases, the procedure presented strikes a favourable balance between the conflicting objectives of adequately reflecting key characteristics of the underlying distributions and smoothing out the gaps between the individual data points in the sample...
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