Hi, In ANOVA 1-way, when the factor level variances are unequal, you can use 1) F approximations (Welch or Brown & Forsyhte). Theses approximations are something similar to the Satterwaihte's t-test approximation 2) a nonparametric test (Kruskal-Wallis)
Francis PEREE "Thomas Souers" <[EMAIL PROTECTED]> a écrit dans le message news: [EMAIL PROTECTED] > Hello, > I have another question regarding one-way ANOVA. I have noticed that in some books, nothing is said about what you can do when the factor level variances are unequal. In Neter's big book, transformations are recommended. If the data are approximately normal, why not just use a Satterthwaite approximate t-statistic for pairwise comparisons? For example, you could use a Bonferroni type procedure. What are people's opinions about this approach? > > > Thanks > > > Check out Cupid School where you will learn from Matchmaker's > best and brightest. Good Luck! > > http://ecard.matchmaker.com/cupid0202/cupid0202.html > > > ================================================================= > Instructions for joining and leaving this list, remarks about the > problem of INAPPROPRIATE MESSAGES, and archives are available at > http://jse.stat.ncsu.edu/ > ================================================================= ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at http://jse.stat.ncsu.edu/ =================================================================
