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.
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Appropriate tests on discrete and paired data
I am going back and forth on which tests to do.
I have two paired variables, that are both positive integers (0,1,2,3...etc). $n = 559$. The variables represent the error resulting from two different ...
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Minimum sample for non parametric test?
Exactly how many sample to be minimum size for non parametric test?
Right now i have 3 data with really2 small sample size
1. 5 pairs for wilcoxon signed rank test (pretest and postest in 1 place)
2. ...
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Wilcoxon Matched-Pairs Signed-Ranks Test result interpretation
Lets assume that I am comparing pre intervention weight and post intervention weight of the participant (paired data). From Wilcoxon Matched-Pairs Signed-Ranks Test I and got p-value 0.03. Am I ...
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Relationship between p-values and effect size
I did a Wilcoxon signed rank test to understand whether there is a difference in average sales in 9 different counties. There are multiple pairs of counties that are significantly different.
Would it ...
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Statistical method comparing difference in extreme percentile
Statistical methods like wilcox.test to t.test test differences in medians or means. I would like to compare the difference in ...
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Combining paired and unpaired samples in Wilcoxon/MWU test
I am trying to compare numbers in two sets (X and Y) to test if numbers in one of the set are statistically larger than the others. However, some of the numbers are paired, and some are not. For ...
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Wilcoxon Rank-Sum vs Signed Rank for paired
I'm working with a dataset that contains paired samples (but some samples are missing their pair) and I want to check for an association between a binary variable and a bunch of numeric variables. ...
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(Repeated) Cross-Validation and Wilcoxon test
Is it a common practice to apply the Wilcoxon test to the (repeated) cross-validation score estimates when comparing two different models? I've read that most of the time the average of the cross-...
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Is the Wilcoxon Rank-sum test the best option with many near 0 values >0?
I have a two very large datasets. They look something like this, but with a few thousand rows. They are the total number of tyrosines in a short DNA sequence with a length of up to 5. A would precede ...
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Why should we report Z when reporting the results of a Wilcoxon Signed Rank test?
I read these guidelines on how to report statistics in APA style and it recommends to report the Z score when reporting the results of a Wilcoxon Signed Rank test. Why is it important to report the Z ...
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Can I use wilcoxon signed rank test for time series data
I have a question about wilcoxon signed rank test. I have 2 different speed profiles (speed starts from time 0 to 100 sec) of the same participant that was given 2 different treatment. I would like to ...
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Is the Wilcoxon paired rank test appropriate for this data?
I have two vectors of normalized data values representing two paired conditions ("methylation" and "expression"). A scatterplot of my data looks like this:
I'd like to know if I am using the Wilcoxon ...
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Zero differences and Wilcoxon signed rank test
I am wondering if the Wilcoxon signed rank test is an appropriate test for my data, that does not follow a normal distribution.
I have 150 datasheets of numbers of drugs measured at two points in time....
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Wilcoxon Rank Test Pre/Post By gender
I am trying to compare the paired pre to post-responses in a student survey to see if gender plays a role. I was told to do a wilcoxon signed ranked test, and I can get the mean and p-value by each ...
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One sample Wilcoxon Rank-Sum Test to compare percentiles
I have 10th, 25th, 50th, 75th and 90th percentiles of a population which is NOT normally distributed. On the other hand, I have a sample from that population and I want to test if its percentiles are ...
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