विधियों की तुलना करें

	Sn and Qn Scale Estimators	क्रमचय (यादृच्छिकीकरण) परीक्षण
क्षेत्र	सांख्यिकी	सांख्यिकी
परिवार	Regression model	Regression model
उद्भव वर्ष	1993	2005
प्रवर्तक	Rousseeuw & Croux	Good (2005); Edgington & Onghena (2007); resampling tradition
प्रकार	Robust scale estimator	Nonparametric resampling test
मौलिक स्रोत	Rousseeuw, P. J., & Croux, C. (1993). Alternatives to the Median Absolute Deviation. Journal of the American Statistical Association, 88(424), 1273-1283.	Good, P. (2005). Permutation, Parametric and Bootstrap Tests of Hypotheses (3rd ed.). Springer. ISBN: 978-0387202792
उपनाम	Sn estimator, Qn estimator, Rousseeuw-Croux scale estimators, robust scale estimation	randomization test, exact permutation test, re-randomization test, Permütasyon Testi
संबंधित	5	5
सारांश	Sn and Qn are robust estimators of scale (spread) proposed by Rousseeuw and Croux (1993) as alternatives to the median absolute deviation (MAD). Both attain a 50% breakdown point while delivering higher statistical efficiency than MAD, so they measure dispersion accurately even when the data contain outliers.	The permutation test is a nonparametric resampling procedure that builds the sampling distribution of a test statistic directly from the data by repeatedly shuffling the group labels. Developed in the resampling tradition and treated systematically by Good (2005) and Edgington & Onghena (2007), it requires no parametric distributional assumption and yields an exact p-value.