Non parametric tests Flashcards
Why use non parametric tests
Less assumptions but less power
What does error does non parametric test cause
Type 2
Why use ranked data
Gets rid of outliers and skew
What is the test statistic if unequal groups
Sum of ranks with least people
What is the test statistic if equal groups
Smaller sum of ranks
Wilcoxon-sum rank/ Mann Whitney
Independent t-test
Independent t-test non-parametric version
Wilcoxon-sum rank/ Mann Whitney
Wilcoxon-signed rank test
Dependent t-test
Dependent t-test non-parametric version
Wilcoxon-signed rank test
Wilcoxon-signed rank test how to calculate
Add up positive ranks then negative ranks
Kruskal- Wallis test
Independent ANOVA
How to calculate Kuskal-Wallis
Ranks are independent of group then compared to chi2 tables can be followed up with pair-wsie comparisons (Man-Whitney)
Jonckheere-Terpstra
Trend testing, tests for ordered patterns
Independent ANOVA non-parametric version
Kruskal-Wallis
Trend testing non-parametric version
Jonckheere-Terpstra
