All Questions
Tagged with wilcoxon-signed-rank paired-data
75
questions
6
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1
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206
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Can Wilcoxon be used in large sample with non-normal distribution?
I am doing my undergrad research, aiming to know the difference of before and after an intervention.
our sample size is 37 which is already considered as a large sample right?
However, when we test ...
- 61
1
vote
3
answers
42
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Wilcoxon Signed rank test for heavily tied paired data
We conducted an experiment to test the effect of a map annotated with the height of landscape features on participant's estimates of height relative to that recorded by a UAV. We asked them to record ...
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0
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0
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9
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Basic question regarding before and after intervention analysis on groups of different sample size
Apologies for the basic nature of this question. I have collected data before and after an intervention and assessed response to the intervention using a survey. This was a basic survey using a 1-5 ...
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1
vote
1
answer
183
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What do these Wilcoxon values tell me?
I did a pre and post-test with a small number of students ($n=12$).These values came after a science intervention that took $4$ weeks. I used a Wilcoxon test for 2 related samples as there was not a ...
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2
votes
1
answer
59
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Paired t-test on dependent samples
I have a set of paired observations, corresponding to patient blood pressure before and after a treatment. I'd like to test for the significance of the treatment by conducting a paired t-test (or ...
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0
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11
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simulate the number of samples to be statistic relevant using a non-paremetric paired test
I have an experiment where a group of subjects must learn to associate some sounds to images (say, sound 1-image 1, sound2-image 2,... soundN-imageN).
They do a memory test (we present sounds and ...
1
vote
0
answers
64
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I'm having trouble choosing between Wilcoxon matched pairs test and McNemar test for a data set
I have a data set on a large group of long-term stroke survivors. I need to determine whether there is a difference in ability (on a scale of 1-10) between their left and right arms. The ordinal data ...
2
votes
0
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341
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A nonparametric test for multivariate paired data? (i.e. multivariate version of wilcoxon signed-rank test?)
I have a set of datasets that have undergone 6 different pre-processing approaches prior to undergoing dimensionality reduction with two different algorithms, after which I score them for structure ...
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3
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0
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75
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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 ...
- 1,089
9
votes
1
answer
478
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If the difference of scores is normally distributed, the sample distributions don't matter in a paired t-test, right?
I have a very straight-forward question:
If the difference of scores is normally distributed, the sample distributions don't matter in a paired t-test, right?
Therefore, If the samples are not ...
- 781
2
votes
1
answer
140
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Wilcoxon Signed Ranks Test for relative differences
Is it correct to use the Wilcoxon signed ranks test for relative differences $\frac{Wx-Wy}{Wy}$, instead of absolute differences $Wx-Wy$? In some cases the relative difference is more relevant, for ...
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1
vote
1
answer
959
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Does Paired T-Test provide the same result as Wilcoxon Signed Rank Test on the same dataset?
In principle they are trying to test the differences in dependent data.
However, do they always provide the same outcome on the same dataset?
What happens if we get contradictory result by using both ...
- 111
1
vote
0
answers
129
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Is 90% of the use of paired signed-rank Wilcoxon test incorrect due to violated distributional assumption of symmetry, or is it more general?
Everywhere, including forums - also this one, handbooks of statistical tests discussions, I can read that the paired Wilcoxon test does require the assumption of symmetry.
This would mean, that:
Most ...
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2
votes
2
answers
530
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Mean difference analysis for a paired data with zero inflation. Can Wilcoxon test work?
I have a set of data that represent the sum of white matter streamlines termination in 64 regions of interest in the brain surface collected from 40 subjects.
Below is an example of a paired data of ...
0
votes
1
answer
145
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Wilcoxon test or paired T test for matched data
I am working on comparisons between two time points 2013 and 2019, I have 180 subjects. I have a numeric "score" from 2013 and 2019. I calculated the average score at both time points and ...
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