Anova 4 - STA 3024 ANOVA(Nonparametric Douglas Whitaker...

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Unformatted text preview: STA 3024: ANOVA (Nonparametric) Douglas Whitaker Statistics Department 22 February 2012 Douglas Whitaker (Statistics Department) STA 3024: ANOVA (Nonparametric) 22 February 2012 1 / 1 The Kruskal-Wallis Test The Kruskal-Wallis test is a nonparametric alternative to One-Way ANOVA, which is itself a generalization of the 2-sample t-test to g groups. As such, this can be thought of the g groups version of the Mann-Whitney U test we covered earlier in the year. Douglas Whitaker (Statistics Department) STA 3024: ANOVA (Nonparametric) 22 February 2012 2 / 1 Assumptions The data come from a continuous population (not count data, etc.). All observations are independent. Each group has roughly the same standard deviation (alternatively, each group has roughly the same variance). Note that there is no assumption of normality. Douglas Whitaker (Statistics Department) STA 3024: ANOVA (Nonparametric) 22 February 2012 3 / 1 Hypotheses Null hypothesis : All the groups are the same (more precisely, all the groups have the same median).precisely, all the groups have the same median)....
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This note was uploaded on 03/01/2012 for the course STA 3024 taught by Professor Ta during the Spring '08 term at University of Florida.

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Anova 4 - STA 3024 ANOVA(Nonparametric Douglas Whitaker...

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