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Test de Friedman

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Test de Friedman

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    1. Master MARKETING / Pierre Desmet 1 Test de Friedman Non paramtrique / chantillons apparis H0 : la distribution des rangs est la mme selon les lignes Lien entre une variable Quantitative (pas nominale) et une variable Nominale plusieurs modalits. ( k chantillons apparis) Exemple : des juges (ligne) valuant des vins (colonnes) Gnralisation de Test du signe plus de 2 colonnes Test de corrlation des rangs de Spearman plus de 2 lignes Le rang est calcul pour chaque ligne indpendamment, puis les rang de deux lignes sont compars Proc freq ; Tables (ligne)*(col / cmh2 scores=rank; (Cochran-Mantel-Haenszel statistics) Lire la seconde ligne : les scores moyens des lignes diffrent En savoir plus : http://www.ats.ucla.edu/stat/sas/whatstat/whatstat.htm

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