8. Tests for Continuous Data - Comparing 3+ Groups

Basic Statistics: Simple Group Comparisons
With Dr Helen Brown, Senior Statistician at The Roslin Institute, December 2015
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Content:
Continuous data – comparing 3+ groups
Statistical tests available to :
--test the hypothesis that all groups are equal

Analysis of variance:
--suitable for normal data
--uses a ‘pooled’ standard deviation estimate for pairwise comparisons

Kruskal-Wallis test
--suitable for non-normal data
--‘non-parametric’

Log-rank test
--Suitable comparing time to event data between several groups