All Questions
Tagged with wilcoxon-signed-rank t-test
62
questions
6
votes
1
answer
206
views
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
0
votes
1
answer
25
views
How to compare semi-independent groups?
I need to compare the answers to a questionnaire (pre / post). The questionnaire was designed using a Likert scale. The two groups were made up of populations, some of whom were in both groups but ...
- 1
2
votes
1
answer
59
views
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 ...
- 23
0
votes
2
answers
62
views
Two sample t-test vs One-sample t-test on residuals [closed]
For some arbitrary data, I have the raw data and a fitted model (not a regression model, but more so a model that accounts for noise and imperfections the data acquisition). I want to see how closely ...
- 1
0
votes
0
answers
30
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Analysing pre and post intervention MCQ results for significance- which statistical test to use?
I have ran a teaching course for students. I carried out pre and post session MCQ quizzes to evidence effectiveness of the course, however the marks collected were anonymised (data collected via ...
0
votes
0
answers
18
views
Determining KAP assessment post-intervention significance: use a paired t-test, signed-rank Wilcoxon, or other?
I'm newer to statistics and unsure how to analyze my data for a cohort study (n=73) where KAP assessments were administered to the same pregnant women before and after an educational intervention for ...
3
votes
1
answer
2k
views
Post-hoc tests after Friedman test
In Statistical Comparisons of Classifiers over Multiple Data Sets (p. 12) Janez Demsar suggests to use the Bonferroni-Dunn test as a post-hoc test after the null hypothesis of an initial Friedman test ...
- 33
9
votes
1
answer
478
views
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
0
votes
0
answers
87
views
Which statistical Test should I use/ Comparing 2 groups
I am new to statistics, can someone guide me regarding the test I should use to compare the foot dimensions of 9 subjects to footwear dimensions (we have 2 footwear brands).
So, to simplify, I have ...
0
votes
0
answers
581
views
Should I perform multiple testing correction (FDR) for all the P-values regardless if they derive from Ttest or Wilcoxon?
There are 100 participants and I want to test if 50 metabolites change before and after intervention (antiobesity drug).
First, I check the normality for each variable, and then I perform a T-test or ...
- 1
1
vote
2
answers
939
views
How to handle the zero deviation with Wilcoxon test and t-test(with zero standard deviation data)
I am a newbie of statistics
I am looking for a statistical test for zero standard deviation data VS a distributed data
Here is the example:
...
- 11
3
votes
2
answers
684
views
Statistical significance test of kurtosis differences
I would like to raise a problem that bothers me. However, I would like to point out right away that my question is purely theoretical, and the data presented here comes only from a computer experiment ...
- 160
7
votes
3
answers
2k
views
Paired t-test with multiple observations per pair
I have a bunch of websites websiteA....websiteZ for example. Now I have an optimization technique that possibly improves the performance of these websites.
I want to check whether this technique ...
- 73
0
votes
0
answers
54
views
Paired Hypothesis Testing with Conversion Samples
Let's assume I have 100s of websites on which I am tracking conversion. At some point I change something to all websites. I want to measure if there is a statistical significant difference between my ...
0
votes
0
answers
311
views
Wilcoxon signed rank test or t-test if data is highly skewed?
I have an variable that is highly skewed and I want to test whether my mean is equal to some fix value in another population. I only have the arithmetic mean of the other population. Because I prefer ...
- 227