About this topic
Before you begin
Use sign tests and Wilcoxon matched-pair signed-rank tests.
Learning goals
- Carry out sign and Wilcoxon matched-pair signed-rank tests and judge when to use them
Syllabus statements covered
- Include: formulation of hypotheses and testing for a population median using Sign test, and identical probability distributions for two sampled populations in a paired difference design using Wilcoxon matched-pair signed rank test; advantages and disadvantages of non-parametric tests. Exclude treatment of tied ranks.
In this topic
Sign and Wilcoxon tests
Test a median with the sign test and paired data with the Wilcoxon signed-rank test, and weigh them against a t-test.