What are requirements to perform Wilcoxon test in JMPAre there any requirements to data distribution shape or variance to perform Wilcoxon test in JMP?
Thanks
Basic Data Analysis and ModelingRe: What are requirements to perform Wilcoxon test in JMPThis is a non-parametric test, so it makes no assumptions about the distribution. It is 'distribution-free.'
Re: What are requirements to perform Wilcoxon test in JMPAre your groups matched pairs, or are they from independent groups?
Re: What are requirements to perform Wilcoxon test in JMPThe data are from independent groups.
I would like to know if any requirements for variance between the two groups, equal vs non-equal?
Re: What are requirements to perform Wilcoxon test in JMPThe data should be of equal variance and the measurement system should be of equal interval, but the distribution does not have to be normally distributed.
Re: What are requirements to perform Wilcoxon test in JMPThanks. Which function in JMP could be used if the data are not normal distribution and variance not equal?
Re: What are requirements to perform Wilcoxon test in JMPIt surprises me that a search for Wilcoxon in documentation returns multiple hits:
https://www.jmp.com/support/help/en/18.0/#search/Wilcoxon
I only knew may be a couple.
A read of some of them reveals two questions: what you data look like, and what is your hypothesis?
Here are some of the relevant hits:
https://www.jmp.com/support/help/en/18.0/index.shtml#page/jmp/statistical-details-for-the-wilcoxon-signed-rank-test.shtml
https://www.jmp.com/support/help/en/18.0/index.shtml#page/jmp/example-of-the-nonparametric-wilcoxon-test.shtml
https://www.jmp.com/support/help/en/18.0/index.shtml#page/jmp/equivalence-test-reports.shtml
https://www.jmp.com/support/help/en/18.0/index.shtml#page/jmp/statistical-details-for-survival-analysis.shtml
All responses from Mark and Jim are relevant. But I think you need to read through those documentations and find the one that is appropriate for your situation.
