Non Parametric Tests Flashcards
Mann Whitney U is non parametric equiv to
Independent groups t test
Wilcoxon signed ranks test basic logic is to find
Each persons difference (or change) score from time 1 to time 2
When reporting Wilcoxon signed-rank t test you don’t give the
Mean
Wilcoxon you report like this
(Mdn =….., range =……..), T = ……., p = …… , r(squared) = ………
Mann-Whitney U rest is referred to as a
Rank sum test
Mann-Whitney U produces what statistic?
U
Mann-Whitney U uses a different formula sometimes why?
For different sample sizes
Mann-Whitney U is reported like this
(Mdn =……., range =……..), U =……., p =………, r(squared) =…….
Kruskal-Wallis test is non parametric equiv to
ANOVA (more than 2 groups)
Kruskal-Wallis H is based on
Ranked data
Kruskal-Wallis uses the
Chi square (xsquared)
Post hoc tests help us to determine
Which groups are sig
Bonferoni adjustment means that you
Divide level of p = .05 by number of comparisons to be performed to give new significance level
Watch out new alpha for post hoc comparisons because
Bonferoni post hoc divides alpha by number of groups!!!
Friedmans ANOVA is the I parametric equiv to the
Repeated measures ANOVA