مجلة المنهل الاقتصادي
Volume 8, Numéro 2, Pages 948-959
2025-12-20
An Overview Of Parametric And Non-parametric Tests Used In Economic Studies
Authors : Djouahra Idris .
Abstract
Selecting the appropriate statistical test is a fundamental step in research, particularly when analyzing relationships and differences between variables. Many students and researchers face difficulties in deciding whether to use parametric or non-parametric tests, leading to potential errors in data interpretation. This paper provides a guide to understanding the key differences between parametric and non-parametric tests and their underlying assumptions. Parametric tests assume normality, homogeneity of variance, and interval/ratio data, whereas non-parametric alternatives are used when these assumptions are violated, particularly with ordinal or non-normally distributed data.
Keywords
parametric ; non-parametric ; tests ; assumptions ; hypothesis testing
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