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Questions tagged [wilcoxon-signed-rank]

a non-parametric rank test to compare two paired samples, whether values in one are bigger than in the other. This test is NOT the same as the sign test.

1 vote
2 answers
2k views

How do you calculate the effect size of one-sample Wilcoxon signed-rank test?

Can you / how do you calculate the effect of a one-sample Wilcoxon signed-rank test? Is there a way to perform the calculation in SPSS or another software package?
Eric's user avatar
  • 11
6 votes
1 answer
2k views

What are the assumptions (and H0) for Wilcoxon signed-rank test?

I am working on the assumption page of the Wilcoxon signed-rank test (the wilcox "paired test") in Wikipedia. I was able to locate a reference for the assumption that I wrote there, which are: Let $...
Tal Galili's user avatar
  • 21.8k
10 votes
3 answers
13k views

How to compute the power of Wilcoxon test?

I am using Wilcoxon test to compare two paired sets of data for whether their means differ. Besides the p-value, I would also like to know the power of this test. How do I compute it in R?
user6302's user avatar
  • 101
0 votes
1 answer
10k views

Please help me interpret these Wilcoxon signed-rank test results

I have 4 sets of data points and for each I want to see how much these values vary from zero. I used the tool for calculating the results of the test on this page but I'm having trouble understanding ...
Griffin's user avatar
8 votes
4 answers
6k views

What method is preferred, a bootstrapping test or a nonparametric rank-based test?

I want to perform a single-tail test on a single sample of real numbers (N~100) against an expected value. The population is known to be not normally distributed. So from what I've read about stats, I ...
Paul Lam's user avatar
  • 255
9 votes
1 answer
2k views

Alternative to the Wilcoxon test when the distribution isn't continuous?

One of the assumptions for using the Wilcoxon sign-rank test is that the underlying distribution is continuous (see here.) However, there are cases (for example, when analyzing Likert scale data) ...
Tal Galili's user avatar
  • 21.8k

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