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	Test di Fligner-Killeen per l'omogeneità delle varianze	Test di Levene e Brown-Forsythe per l'uguaglianza delle varianze
Campo	Statistica	Statistica
Famiglia	Regression model	Regression model
Anno di origine	1976	1960
Ideatore	Michael A. Fligner & Timothy J. Killeen	Howard Levene; Morton B. Brown and Alan B. Forsythe
Tipo	Rank-based test for homogeneity of variances	Homogeneity of variance test (robust)
Fonte seminale	Fligner, M. A., & Killeen, T. J. (1976). Distribution-Free Two-Sample Tests for Scale. Journal of the American Statistical Association, 71(353), 210-213.	Levene, H. (1960). Robust Tests for Equality of Variances. In Contributions to Probability and Statistics: Essays in Honor of Harold Hotelling. Stanford University Press.
Alias	Fligner-Killeen test of variance homogeneity, rank-based variance homogeneity test, Fligner-Killeen Varyans Homojenliği Testi	Levene test, Brown-Forsythe test, homogeneity of variance test, Levene ve Brown-Forsythe Varyans Testi
Correlati	5	5
Sintesi	The Fligner-Killeen test is a rank-based test that checks whether several independent groups share the same variance (scale). Introduced by Fligner and Killeen in 1976, it does not require the data to be normally distributed, making it a robust nonparametric alternative to the Levene and Bartlett tests.	The Levene and Brown-Forsythe test checks whether two or more groups share the same variance (homogeneity of variance). Levene (1960) built the test on absolute deviations from each group mean, and Brown and Forsythe (1974) made it robust to non-normal data by centring on the group median instead.