Application of the Non-Parametric Signals Test to a Company

Objective: The aim of this paper is to show the application of the Non-Parametric Sign Test in problems involving the testing of central tendency values.   Theoretical framework: Non-parametric methods are widely used in the study of populations that are taken in rank order (such as a movie that rec...

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Veröffentlicht in:RGSA : Revista de Gestão Social e Ambiental 2024-02, Vol.18 (2), p.e04954
Hauptverfasser: Sampaio, Nilo Antônio S., Mazza, Felipe Cury, De Siqueira, Sílvio Sérgio Silveira, Miranda Junior, João Ercio, De Abreu, Laura Dutra, De Lima, Rafael Martins
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Sprache:eng
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Zusammenfassung:Objective: The aim of this paper is to show the application of the Non-Parametric Sign Test in problems involving the testing of central tendency values.   Theoretical framework: Non-parametric methods are widely used in the study of populations that are taken in rank order (such as a movie that receives one to four star ratings). The use of non-parametric methods may also be necessary when the data has a ranking but no clear numerical interpretation, such as when accessing preferences. In terms of scale, non-parametric methods result in data that is "in order" (Thatcher et al., 2005)   Method: Data was taken from a company in the South of Rio de Janeiro and a case study was carried out using the Non-Parametric Sign Test.   Final Considerations: Initially it proved unfeasible to use a Parametric Test because the Anderson-Darling Test showed that the Assumption of Normality was not confirmed and finally the Non-Parametric Sign Test showed that the hypothetical Median really is the correct measure of Central Tendency.   Implications of the research: The use of Non-Parametric Tests is widespread in scientific literature and has proven to be highly effective in dealing with data where the assumptions of Normality are not confirmed.   Originality/value: Despite being well-known statistical tools, Non-Parametric Tests are widely used and can bring innovations to their application, as in the case of the company in question. Objetivo: El objetivo de este trabajo es mostrar la aplicación de la Prueba de Signos No Paramétrica en problemas que implican la comprobación de valores de tendencia central. Fundamento teórico: Los métodos no paramétricos se utilizan ampliamente en el estudio de poblaciones que se toman por orden de puntuación (como una película que recibe puntuaciones de una a cuatro estrellas). El uso de métodos no paramétricos también puede ser necesario cuando los datos tienen una calificación pero no una interpretación numérica clara, como en el caso del acceso a las preferencias. En términos de escala, los métodos no paramétricos dan como resultado datos "en orden" (Thatcher et al., 2005). Método: Se tomaron los datos de una empresa del Sur de Río de Janeiro y se realizó un estudio de caso utilizando la Prueba de Signos No Paramétrica. Consideraciones finales: Inicialmente, resultó inviable utilizar una prueba paramétrica porque la prueba de Anderson-Darling demostró que no se confirmaba el supuesto de normalidad y, finalmente, la prueba de signos no p
ISSN:1981-982X
1981-982X
DOI:10.24857/rgsa.v18n2-071