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Stats, Volume 6, Issue 3

September 2023 - 14 articles

Cover Story: Using two-factor fixed-effects ANOVAs, we show how to construct orthonormal F contrasts for main effects, while with equally replicated models, we also show how to construct orthonormal F contrasts for interaction effects. Our primary focus is when the levels of both factors are ordered. For these models, the interaction contrasts may be interpreted as generalised correlations. Thus, for example, ordinary correlation (linear–linear) and umbrella (linear–quadratic) effects may be detected. Our analysis is objective, whereas the standard plots only permit a subjective scrutiny of the data. View this paper
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Articles (14)

  • Article
  • Open Access
2 Citations
2,377 Views
14 Pages

A Family of Finite Mixture Distributions for Modelling Dispersion in Count Data

  • Seng Huat Ong,
  • Shin Zhu Sim,
  • Shuangzhe Liu and
  • Hari M. Srivastava

18 September 2023

This paper considers the construction of a family of discrete distributions with the flexibility to cater for under-, equi- and over-dispersion in count data using a finite mixture model based on standard distributions. We are motivated to introduce...

  • Article
  • Open Access
1,913 Views
11 Pages

18 September 2023

COVID-19 spread dramatically across the world in the beginning of 2020. This paper presents a novel alert system that will detect abrupt changes in the COVID-19 or other pandemic incidence rate through the estimated time-varying reproduction number (...

  • Article
  • Open Access
3 Citations
1,795 Views
11 Pages

1 September 2023

In multifactor fixed-effects ANOVAs, we show how to construct orthonormal F contrasts for main effects. Our primary focus is the case when the levels of the factor of interest are ordered. Likewise, in multifactor equally replicated fixed-effects ANO...

  • Article
  • Open Access
4 Citations
2,714 Views
13 Pages

Investigating Self-Rationalizing Models for Commonsense Reasoning

  • Fanny Rancourt,
  • Paula Vondrlik,
  • Diego Maupomé and
  • Marie-Jean Meurs

29 August 2023

The rise of explainable natural language processing spurred a bulk of work on datasets augmented with human explanations, as well as technical approaches to leverage them. Notably, generative large language models offer new possibilities, as they can...

  • Article
  • Open Access
1 Citations
5,365 Views
21 Pages

Statistical Predictors of Project Management Maturity

  • Helder Jose Celani de Souza,
  • Valerio Antonio Pamplona Salomon and
  • Carlos Eduardo Sanches da Silva

15 August 2023

Global scenarios of organizations show investments wasted in projects with poor performances in more than 11 percent of cases, according to the Project Management Institute. This research aims to guide organizations in assertively investing in the ri...

  • Article
  • Open Access
1 Citations
2,609 Views
29 Pages

11 August 2023

To address the difficult problem of the multi-step-ahead prediction of nonparametric autoregressions, we consider a forward bootstrap approach. Employing a local constant estimator, we can analyze a general type of nonparametric time-series model and...

  • Article
  • Open Access
2 Citations
1,437 Views
27 Pages

9 August 2023

In surveys requiring cost efficiency, such as medical research, measuring the variable of interest (e.g., disease status) is expensive and/or time-consuming; however, we often have access to easily obtainable characteristics about sampling units. The...

  • Communication
  • Open Access
5 Citations
2,064 Views
10 Pages

On the Extreme Value H-Function

  • Pushpa Narayan Rathie,
  • Luan Carlos de Sena Monteiro Ozelim,
  • Felipe Quintino and
  • Tiago A. da Fonseca

4 August 2023

In the present paper, a new special function, the so-called extreme value H-function, is introduced. This new function, which is a generalization of the H-function with a particular set of parameters, appears while dealing with products and quotients...

  • Article
  • Open Access
8 Citations
2,214 Views
29 Pages

The New Exponentiated Half Logistic-Harris-G Family of Distributions with Actuarial Measures and Applications

  • Gayan Warahena-Liyanage,
  • Broderick Oluyede,
  • Thatayaone Moakofi and
  • Whatmore Sengweni

31 July 2023

In this study, we introduce a new generalized family of distributions called the Exponentiated Half Logistic-Harris-G (EHL-Harris-G) distribution, which extends the Harris-G distribution. The motivation for introducing this generalized family of dist...

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Stats - ISSN 2571-905X