Relationships · Method bridge
Choosing a Two-Group Comparison
Are you comparing means, paired changes, or relative positions?
Page 1 of 6 · Question
What are you trying to compare?
A t-test and a rank-sum test are not two interchangeable routes to the same answer. Begin with the quantity the research question asks you to compare.
Start with structure: What does one row represent? Are the groups independent,
or are observations paired or repeated?
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